Waterproof Laptop Bags and Sleeves: The 16-inch OEM Spec Guide

Sleeve, Briefcase or Backpack: The Laptop Format Decision

A laptop is the only thing most people carry that is simultaneously rigid, flat, heavy and intolerant of both water and impact. That combination drives the format decision before any material is chosen. A sleeve protects the device and nothing else, which makes it the lightest and the least useful on its own. A briefcase adds document and charger capacity but puts the whole load on one hand. A backpack distributes it across two shoulders but adds the ergonomic problem of a rigid panel against the back.

We ask three questions before recommending a format. How many minutes a day is the bag on the person? Does the user need their hands free at the door, at the turnstile, or on a bike? And is the laptop ever checked in or placed under a seat, because that changes the impact case entirely. The answers sort almost every brief into one of three families, and the families differ in the padding spec and in the closure spec, not just in the strap layout. The full range we build is shown on our products page.

The format decision also fixes the padded volume, and that is the number that determines whether the finished bag feels right. A 16 inch device with a protective shell on it is not a 16 inch object, it is closer to a 17 inch object, and a bay cut to the nominal size will not close. We size every bay from the actual device in its case, and we state that on the tech pack so a reviewer does not later discover the fit problem at the sample stage.

Sizing the Laptop Bay for 13 to 16 inch Devices

Laptop sizing is nominally a diagonal screen measurement, but a bay has to be cut in width, depth and height, and the diagonal tells you none of them. A 14 inch machine and a 16 inch machine differ in width by roughly 40 mm and in depth by about 25 mm, and the 16 inch model also tends to be thicker at the hinge. Cutting a bay to the nominal diagonal is the most common cause of a first sample that will not close, and it costs a full sampling round to correct.

Our rule is 4-6 mm of real clearance on width and depth, measured to the device in its case, and 3-5 mm on thickness. That tolerance sounds generous and it is deliberate: it allows a device from a different generation to fit, it prevents the zip from bearing on the corner of the machine, and it leaves room for the padding to compress without transmitting load. We also add a false bottom, a 20 mm gap between the base of the bay and the base seam of the bag, so a device dropped into the bay never rests directly on the weld.

• 13 inch bay: 305 mm internal width, 215 mm depth, 18 mm thickness allowance
• 14 inch bay: 325 mm internal width, 228 mm depth, 18 mm thickness allowance
• 15 inch bay: 350 mm internal width, 242 mm depth, 20 mm thickness allowance
• 16 inch bay: 365 mm internal width, 250 mm depth, 22 mm thickness allowance, plus a case allowance of 6 mm all round
• Every bay gets a false bottom of 20 mm and a padded lip at the mouth so the corner does not contact a slider
• Where a brief covers 13 and 16 inch machines, we build two bays or one bay with a removable sleeve, never one bay stretched to fit both

A suspended bay is the single most valuable construction in this category. Instead of sewing the bay to the base of the bag, we hang it from two webbing tabs at the top and leave the bottom floating 20 mm above the base seam. A bag built this way passes a corner drop that a directly sewn bay fails, because the device never touches the ground-loaded panel. The tabs carry into the main load path and are bar-tacked to a reinforcement panel, which is why the suspended construction adds a small amount of labour and a large amount of protection.

Shell and Laminate Choices for Laptop Carriers

Laptop shells are chosen for a different reason than outdoor shells. Nobody takes a commuter bag into white water, so the hydrostatic head requirement is about a sustained downpour and a soaked train platform, not about immersion. What matters far more is that the shell is dimensionally stable, because a bay that stretches will put pressure on a screen, and that the face fabric resists the scuffing that comes from being slid under a seat and along a desk.

We default to a 600D or 840D TPU-laminated polyester at 10,000 mm for commuter and corporate lines, and to a 420D TPU-laminated face at 10,000 mm for lightweight sleeves where the priority is that the whole thing folds flat into a cabin bag. A PVC-coated scrim is an option where a client wants a wipe-clean, leather-like finish for a corporate range, and we flag in writing that it stiffens in the cold and is not our choice for a bag used outdoors in winter.

• 420D TPU-laminated polyester, 10,000 mm, for sleeves and ultralight carriers under 500 g finished weight
• 600D TPU-laminated polyester, 10,000 mm, the default for 13-16 inch commuter backpacks and briefcases
• 840D TPU-laminated nylon, 20,000 mm+, for field and industrial laptop programmes and for bags with external lash points
• PVC-coated 500D scrim, 10,000 mm, only for corporate finishes where cold-flex is not required
• A PFC-free durable water repellent finish on every face, checked at 90-100 spray rating under AATCC 22 when new

Hydrostatic head is verified to ISO 811 on the finished laminate, not on the base fabric, because the lamination step is where most of the variance sits. We hold a 10,000 mm minimum on every laptop shell and we will not go below it, because the alternative is a coating thin enough to abrade through at the corners within a year. Coating adhesion and abrasion are checked to ASTM D751 on the same lot. Background on how those numbers are produced is on our hydrostatic pressure page.

Padding Stack: EPE, EVA and the Corner Crush Number

The padding stack is where a laptop bag either earns its price or does not. A laptop fails at its corners and at its hinge, not across the middle of the lid, so the stack has to be thickest and densest where the corners are. Two materials do the work: closed-cell EPE for bulk and recovery, and EVA for the denser outer layer that spreads a point load. Using only one of them is the usual mistake, and it shows up as a bag that feels soft to the hand and still breaks a screen.

We specify the stack as three layers. An outer 3 mm EVA at 55-65 Shore A spreads the point load. A middle 6-8 mm EPE at 25-30 kg/m3 absorbs the energy. An inner 2 mm brushed tricot protects the finish of the machine and, just as importantly, stops the padding gripping the device when it is pulled out. At the four corners of the bay we double the middle layer rather than adding thickness everywhere, which keeps the bag slim where it matters and thick only where the impacts happen.

The corner crush number we hold is simple and it is the one we test to. A 25 mm square indenter is pressed into each corner of the assembled bay at 5 mm per minute to a load of 250 N, and we require the remaining stack thickness at that load to be at least 4 mm. If a thinner, cheaper stack bottoms out before 250 N, the load goes straight into the corner of the machine and the screen cracks. That single test is what separates a protective laptop bag from a decorative one, and we run it on production samples as well as on prototypes.

The 90 cm Corner Drop Test on a Loaded Bay

We test laptop bags at 90 cm rather than at the 1.2 m we use for camera bags, because the real event for a laptop is different. A laptop bag is set down, slid off a trolley handle, or dropped from a desk or a chair arm, and it almost never falls from hip height while being worn. 90 cm is desk height, and the dominant orientation is a corner, because a bag falling onto a hard floor nearly always lands on its base edge rather than flat.

Drop sequence for a 13-16 inch bay

1. A rigid 16 inch dummy mass of 2.2 kg, with a 1.5 mm aluminium plate to simulate the lid, is placed in the bay
2. The bag is conditioned at 23 degrees C for 4 hours, then the sequence is repeated after 4 hours at minus 5 degrees C
3. Six drops are performed: two onto each base corner, one onto the base face, and one onto the bay mouth
4. After each drop the dummy is inspected for lid deformation and the stack is measured for residual thickness
5. The closure is opened and closed five times after the sequence to confirm the slider and the teeth still track
6. Pass requires no visible deformation of the dummy, no stack compression below 4 mm, and a fully functional closure

The cold stage matters for a specific reason in this category. A welded or fused corner on a laptop shell is often the stiffest part of the bag, and in the cold that stiffness becomes brittleness. We see shells that pass easily at room temperature and crack at a weld corner at minus 5 degrees C, which is a realistic temperature for a bag left in a vehicle overnight in a northern winter. When a brief includes that exposure we move to a TPU laminate and we avoid a fused corner entirely, using a folded and taped construction that can move.

The fifth step in the sequence is the one that catches poor-quality sliders. A drop onto the bay mouth loads the slider directly, and a light alloy slider with a thin pull tab will bend and then fail to track. Every laptop programme we build uses a slider with a cast body and a reinforced pull, and that is a hardware line item we do not let anyone value-engineer out, because a bag that cannot be closed is a bag that does not protect anything.

Closure and Zip Garage Geometry on Laptop Bays

The laptop bay is the one compartment on a bag where a closure failure is catastrophic rather than inconvenient, so its geometry deserves its own drawing. The bay is almost always closed with a coil or reversed-coil zip, and the two failure modes are water tracking down the front panel into the zip, and the slider dwelling at the point where the zip turns the corner of the bay. Both are solved by geometry rather than by a more expensive zip.

A garage is a folded extension at the end of the zip run that the slider parks inside, and it has to be deep enough to cover the slider body, not just the pull. We specify 18-22 mm of covered length and we line it with the same laminate as the shell so the garage is a tube and not a flap. On the bay itself we add a 12 mm storm welt over the coil, cut on the same curve as the bay mouth, because a straight welt across a curved bay mouth leaves two gaps at the corners where water enters.

For a brief that targets IPX7 at the bay, we drop the zip entirely and use a roll-top or a three-fold flap with a toothed moulded seal. That is a genuine trade-off: it is slower to open and it makes a briefcase look less like a briefcase. We put the choice in front of the buyer with the access time stated, because a corporate client who wants a sleek briefcase will not accept a roll-top lid, and a field client who works in the wet will not accept a zip. The closure target is written into the tech pack as a number under IEC 60529, not as a word.

Water Ingress Testing of the Laptop Compartment Itself

Most suppliers test a bag by spraying the outside and then looking for damp anywhere inside. For a laptop bag that is the wrong test, because the only place that matters is the bay. We therefore test the bay in isolation: a paper target and a moisture indicator card are placed inside the bay, the bag is closed normally, and the whole assembly is exposed. The bay is then opened and the target is examined, and a single spot of moisture at the mouth of the bay is a fail even if the rest of the interior is dry.

The sequence runs spray under AATCC 22, then a 5 minute shower under AATCC 35, then the IPX5 and IPX6 jet exposures from IEC 60529. A commuter briefcase that will see a wet platform and a dash to the office needs IPX5 at the bay as a minimum and IPX6 as a target. A bag built for a cycling commuter needs IPX6, because at 25 km/h the rain arrives as a jet rather than as a shower and it is driven straight into the panel the rider leans over.

• Spray stage, AATCC 22, 250 ml over 25-30 seconds, target rating 90-100 when new and 80+ after ageing
• Shower stage, AATCC 35, 5 minutes at 2 L/min, pass requires a dry indicator card in the bay
• Jet stage, IPX5 at 12.5 L/min from 3 m for 3 minutes, the minimum for a commuter briefcase
• Strong jet stage, IPX6 at 100 L/min from 3 m for 3 minutes, the target for cycling and marine-adjacent briefs
• Immersion stage, IPX7 at 1 m for 30 minutes, only for roll-top or moulded-seal builds, never for a zip bay

The result is reported per compartment, not per bag. That sounds like a detail and it changes the outcome of a programme, because a common pattern is a shell that is fully waterproof and a bay that is only shower resistant, and the two get averaged together into a claim the bag cannot support. Our test reports list the bay result, the main compartment result and the front pocket result separately. The method and the report format are documented on our water ingress test methods page.

Thermal Load and Condensation in a Closed Laptop Bay

A closed, well-sealed laptop bay is the closest thing in this category to a greenhouse, and the failure it produces is one that no water test will ever reveal. A machine that has been running is warm. If it is placed in a sealed bay and then carried into cold air, or if a cold machine in a sealed bay is carried into a warm office, moisture condenses on the coldest surface in the bay, which is the metal chassis or the screen. Over a season, that cycle corrodes connectors and fogs displays, and the bag is doing it while passing every ingress test.

The mitigation is a deliberate leak, and we say so plainly because it surprises buyers who have just asked for the best possible seal. We leave a 6-8 mm vent path at the top of the bay, formed between the bay panel and the shell and protected by a downward-facing baffle, so air can move and water driven by a jet cannot. On a corporate briefcase we put the vent behind the handle panel where it is invisible. On a cycling commuter bag we make it a drainage grommet as well, so any water that does get in leaves rather than pooling.

• Vent the bay at the top with a 6-8 mm baffled path, because a perfect seal traps moisture against a warm chassis
• Never place the bay directly against the outer shell on a sealed bag; leave an 8 mm air gap on the external face
• Use a brushed tricot inner facing, not a coated liner, so the facing can hold and release moisture rather than sheeting it
• Add a drainage grommet at the base of the bay on cycling and outdoor briefs, 4 mm, positioned at the lowest point
• Where a client insists on IPX7 at the bay, add a 20 g desiccant pocket and a printed care card telling the user to air the bag

There is a second thermal issue that is specific to this category and that we check for: charger heat. A laptop charger stored in the same bay as the machine, or in an adjacent pocket with no air path, will raise the local temperature of the bay and accelerate any moisture problem. We give the charger its own pocket with a mesh panel, isolated from the bay by one layer of EPE, and we state on the tech pack that the charger pocket is not to be ventilated into the bay. It is a small layout decision and it prevents a surprising number of field complaints.

Cable, Charger and Accessory Layout

The accessory layout is where a laptop bag is won or lost in reviews, and it is also the area most often copied badly. A commuter carries a charger, a cable, a mouse, a phone, a notebook and a water bottle, and the complaint that appears most often in returns is not that these items do not fit, it is that they are all in one pouch and the user cannot find them. The fix is not more pockets, it is fewer pockets with defined shapes and elastic retention.

We build the accessory side as a book-style panel with slip pockets of three widths, each with an elasticated top edge, plus one zip pocket for small items. A charger gets a dedicated slip pocket with a retention strap, because a loose charger brick abrades everything it touches and is the heaviest single accessory. A water bottle pocket, if the brief includes one, is always external and always has a drain, because an internal bottle pocket on a bag carrying a laptop is a claim waiting to happen.

• Three slip pockets at 70 mm, 100 mm and 150 mm widths, each with an elasticated top edge, on a book-style panel
• One zip pocket for cards and small items, with a 5 mm storm welt over the coil, isolated from the bay
• A dedicated charger pocket with a 20 mm retention strap, placed on the opposite side of the bag from the bay
• Pen slips at 12 mm, two of them, because a single pen slip is used for a stylus and then there is nowhere for a pen
• An external bottle pocket with a 4 mm drain grommet at its base, never an internal bottle pocket on a laptop bag

The layout is drawn at 1:1 and reviewed against a physical mock-up of the accessory set before the first sample is cut. That step takes a day and it removes an entire revision round, because accessory complaints are a fit problem and a fit problem cannot be solved by changing the fabric. We ask every client for the actual charger and the actual bottle at the start of a programme, and we size the pockets to those objects rather than to a nominal dimension taken from a competitor listing.

Carry Comfort and Shoulder Load on Daily Commutes

A laptop load is awkward in a way that a camera load is not. A 2.2 kg machine plus a 0.6 kg charger plus a bottle puts 3-4 kg into the bag, and that mass is flat, rigid and sits directly against the back. On a backpack the ergonomic problem is therefore not the weight, it is the hard panel: it creates a pressure point in the middle of the back and it traps sweat against a surface that does not breathe. On a briefcase the problem is the opposite, because 3-4 kg on one trapezius for twenty minutes produces neck pain for most users.

For backpacks we build the harness around that rigid panel, not around the bag. The panel is placed against a 10 mm EPE channel with two raised air channels moulded into it, the shoulder pads are 60 mm wide with EVA at 55-60 Shore A, and the load lifters are set at 45 degrees so the top of the bag is pulled toward the shoulders rather than away from them. For briefcases we use a 45 mm webbing strap with a 90 mm removable pad, and we make the pad removable because a corporate user will take it off for a client meeting and put it back on for the walk.

One item we now recommend as standard on any commuter laptop backpack over 15 L is a trolley sleeve. It sounds like a travel feature and in practice it is a commute feature, because it lets the user put the bag on a cabin trolley for the airport and on their back for the walk, without carrying 4 kg on their shoulders for the whole journey. It costs a panel of fabric and one zip, and it is the accessory most often requested by the users of the bags we make.

TSA Lay-Flat and Travel-Friendly Laptop Bays

A travel-oriented laptop bag has one additional requirement that overrides the others: the bay has to open flat, 180 degrees, so the machine can stay in the bag at a security checkpoint. A bay that opens only at the mouth forces the user to remove the machine, and a machine placed loose in a plastic tray is the single most common origin of the corner damage we see in the field. This requirement conflicts with waterproofing, and the resolution is a specific construction rather than a compromise.

We build a lay-flat bay with the zip running down both sides and across the base, so the front panel hinges away completely, and we put the storm welt on the inner face of that panel rather than over the coil. Water that would otherwise enter at the coil is then collected by a shallow channel along the base of the bay and directed to a 4 mm drain at each end. The bay still passes IPX5 and, with a three-fold flap added over the top, IPX6, and it opens flat in under two seconds.

• Zip runs down both sides and across the base, so the panel hinges 180 degrees and the bay lies flat
• Storm welt on the inner face of the hinged panel, not over the coil, so it does not obstruct the hinge
• A 6 mm collection channel along the base of the bay, draining to a 4 mm grommet at each end
• A three-fold flap over the top of the bay for IPX6 on travel briefs, tapered at both ends to shed water
• A 200 mm trolley sleeve, open at the base, so the bag slides onto a cabin handle without the bay being opened

The drain grommets are the part that clients question, because putting a hole in a waterproof bay sounds wrong. The reason it works is that the grommet is at the end of a channel, not in the wall of the bay, and it is protected by a downward-facing lip, so water driven by a jet cannot climb into it. Water that does enter runs down the channel and out. In our testing a lay-flat bay built this way holds a lower internal moisture level after an IPX6 exposure than a fully sealed bay with no drain, because the sealed bay has nowhere to put what gets in.

Branding and Colourway for Corporate Laptop Lines

Corporate and education laptop programmes are the most branding-sensitive work we do, because the bag is seen every day in an office or a lecture hall and it carries a logo that someone has signed off. The two constraints are that the logo must not compromise the shell, and that the process must survive a year of daily use against a desk edge. A heat-transfer patch on a flat panel lifts at the corners within months; an embroidered logo pierces the waterproof layer and can only be used on a non-critical panel or over a backing tape.

Our recommendation for this category is a moulded TPU or silicone badge, either welded to the panel or sewn into a seam allowance so the needle holes sit inside the seam. For education and promotional programmes where the budget does not stretch to a badge, a woven label sewn into a seam allowance is the next best option and it holds well. We do not recommend direct printing onto a TPU-laminated face for a bag that will be slid along a desk, because the print abrades where the bag actually contacts the desk.

• Moulded TPU or silicone badge, welded or sewn into a seam allowance, the most durable option for daily corporate use
• Woven label sewn into a seam allowance so the needle holes do not pierce the waterproof face
• Debossed or embossed logo on a moulded base pan or on a zip pull, for a low-contrast premium execution
• Tonal execution for professional ranges, because a loud logo reduces the perceived value of a business bag
• Reflective piping on the front panel for cycling commuters, which doubles as a brand signature and a safety feature

Colourway planning has to respect the 500 pcs per style per colour minimum. A corporate programme that wants three colours is a 1,500-piece commitment, and most corporate buyers discover they only need two. We suggest a black or charcoal base with the accent colour applied to the zip tape, the pull and the lining, because that gives a two-colour look from a single shell colour and it keeps the first commitment at 500 pieces. Our contact page is the fastest route to a quote on that basis.

MOQ, Sampling and Laptop Bag Lead Times

The commercial terms for a laptop programme are the same terms we publish for every category, and we publish them because surprises in this area cost more than the order is worth. Minimum order is 500 pcs per style per colour. Sampling is 6-10 working days for a sleeve, a briefcase or a commuter backpack, and 12-15 working days where the brief includes a moulded base pan or custom hardware. Bulk is 35-50 days from sample approval. Inspection is to AQL 2.5 under ISO 2859-1, and the trade terms are FOB Xiamen with T/T 30 percent deposit and 70 percent before shipment.

1. Brief received with the device dimensions in its case, not the nominal screen size, plus the charger and accessory set
2. Material, padding stack and closure proposal issued with the hydrostatic head, the IPX target and the bay clearance stated as numbers
3. Prototype built on production tooling in 6-10 working days, or 12-15 for a moulded or custom-hardware build
4. Corner crush, 90 cm drop and bay ingress testing performed on the prototype, reported before the sample ships
5. One revision round if required, at 6-10 working days, then approval and deposit
6. Bulk production in 35-50 days with in-line checks and a final AQL 2.5 inspection, then FOB Xiamen shipment

QUANZHOU JUNYUAN BAGS has run sewn and welded bag programmes since 2014, and our founder has been in the industry since 2004. Our validated production partner facility is SGS-verified at 4,950 square metres, with 7 production lines, 149 machines, 137 staff and a monthly capacity of 200,000 pieces. The quality system runs to ISO 9001-aligned procedures and the site is not currently BSCI-audited. Product compliance work covers CE, CPC, RoHS and REACH, and material testing is supported by SGS. For laptop programmes we add the corner crush and bay ingress reports to that file. Write to service@junyuanbags.com or message us on WhatsApp at +86 177 5002 0688, or begin with the custom development brief.

One closing note on this category, because it saves the most rework. Before you send a brief, measure the 16 inch device you intend to fit, in its case, in all three dimensions, and send those three numbers. A bay built from a nominal diagonal will not close, and correcting it later costs a sampling round that is entirely avoidable. That single piece of information is the difference between a first sample that is approved and a first sample that goes back.

Frequently Asked Questions

Q1: What clearance does a 16 inch laptop bay need?

A: A 16 inch bay needs 4-6 mm of real clearance on width and depth beyond the device in its case, and 3-5 mm on thickness, which puts the internal width at roughly 365 mm. We also add a 20 mm false bottom so the hinge never rests on the base seam. Sizing from the nominal diagonal instead will produce a first sample that will not close.

Q2: What is the minimum hydrostatic head for a waterproof laptop bag?

A: We hold 10,000 mm measured to ISO 811 as the minimum on every laptop shell, and we go to 20,000 mm+ for field and industrial programmes. Below 10,000 mm the coating is thin enough to abrade through at the corners within a year, and a laptop bag fails at its corners more often than across the panel.

Q3: Can a zip-closed laptop bay reach IPX7?

A: A zip-closed bay tops out at IPX6 in our testing, and that is a good result for a commuter bag. IPX7 requires either a roll-top or a moulded toothed seal, both of which are slower to open. If a brief demands IPX7 at the bay, we specify a three-fold flap or a roll-top and we state the access time on the tech pack so the trade-off is visible.

Q4: Why do you drop-test laptop bags at 90 cm and camera bags at 1.2 m?

A: Because the real events differ. A laptop bag is set down, slides off a trolley handle or falls from a desk, so 90 cm with a corner orientation is the realistic event. A camera bag is carried and often removed at height, and it carries a heavier, denser load, so we test it at 1.2 m from hip height in six orientations.

Q5: What is the corner crush test you use?

A: A 25 mm square indenter is pressed into each corner of the assembled bay at 5 mm per minute to a load of 250 N, and we require at least 4 mm of stack thickness to remain at that load. A stack that bottoms out passes the load straight into the corner of the machine and cracks the screen.

Q6: Should a laptop bay be fully sealed to keep water out?

A: No. A fully sealed bay traps moisture from a warm chassis and from cold-to-warm transits, and it condenses on the metal and the screen. We vent the bay at the top with a 6-8 mm baffled path so air moves and a jet cannot enter, and we add a drain grommet on cycling and outdoor briefs.

Q7: What padding stack do you recommend for a 16 inch laptop?

A: Three layers: 3 mm of EVA at 55-65 Shore A to spread the point load, 6 mm of closed-cell EPE at 25-30 kg/m3 to absorb the energy, and 2 mm of brushed tricot to protect the finish. At the four corners we double the EPE to 12 mm rather than thickening the whole panel.

Q8: What is the minimum order quantity for a custom laptop bag?

A: The minimum is 500 pcs per style per colour, so a two-colour launch is a 1,000-piece commitment. Where a client wants a two-colour appearance without the second commitment, we put the accent on the zip tape, the pull and the lining and keep the shell to a single colour.

Q9: How long does laptop bag sampling take?

A: Sampling is 6-10 working days for a sleeve, briefcase or commuter backpack, and 12-15 working days where the brief includes a moulded base pan or custom hardware. The prototype ships with its corner crush, drop and bay ingress reports so a buyer can review the results and the physical sample together.

Q10: What is the bulk lead time for a laptop bag order?

A: Bulk production takes 35-50 days from sample approval, depending on fabric availability and on whether moulded parts are used. Repeat orders against retained tooling and stored patterns run in a shorter 30-40 day window. Shipments move on FOB Xiamen with T/T 30 percent deposit and 70 percent before shipment.

Q11: Do you offer a lay-flat bay for airline security?

A: Yes, and it is the right choice for any travel-oriented brief. The zip runs down both sides and across the base so the panel hinges 180 degrees and the machine stays in the bag at the checkpoint. A shallow channel at the base of the bay catches any ingress and drains it through a 4 mm grommet at each end.

Q12: Which inspection level applies to laptop bag orders?

A: We inspect to AQL 2.5 under ISO 2859-1 as standard, and we can tighten to 1.5 for critical defects on high-value programmes. For a laptop bag, a critical defect includes any bay stitch that would let the device fall, any slider that fails to track, and any corner stack that measures below the specified thickness.

Q13: Can you put a logo on a waterproof laptop shell?

A: Yes, and the process matters. A moulded TPU or silicone badge welded to the panel, or sewn into a seam allowance, is the most durable. A woven label sewn into a seam allowance is the good lower-cost option. We do not recommend direct printing onto the face of a bag that will be slid along a desk, because the print abrades.

Q14: Why does a laptop bag need a charger pocket separate from the bay?

A: A charger brick is the heaviest accessory and it abrades whatever it touches, and a running or recently used charger raises the local temperature of the bay and accelerates any moisture problem. We give it a dedicated slip pocket with a retention strap, isolated from the bay by a layer of EPE and with its own air path.

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