Clean zone
- Towel, spare kit and electronics ride here.
- Held off the wet by a PU-coated backing panel.
- A leak runs down the liner, away from the load.

The wet zone and the loaded strap are where a sports bag gives out — a liner that wicks through its stitching, an anchor that tears out of the panel. Both are settled at the sample stage, down to the odour check that seals used kit for 48 hours; the bulk run then repeats the signed sample, so nothing drifts between the two.
Sports types
Equipment sets the pattern — a stick has a length, a bat a barrel, a racquet head — and the sports bag is drafted around whichever one the order is built for. Anything not listed here is still workable: it is drafted from the sketch or the reference bag the same way.









The wet zone
Wet kit, soaked training gear and boot grit all ride in one shell, and none should touch the clean load. Keeping them apart is a question about lining and seam construction in a sports bag, not about how many pockets the pattern carries.
| Lining | What it is good for | Choose it when | Where it fails |
|---|---|---|---|
| PEVA film | Splash and damp kit. The economical film for gear that comes home damp, never soaked. | Damp towel, swimsuit, rinsed top — never standing water. | Flexing at a fold — an unbacked film creases white and splits. |
| PU coating | Rain and everyday damp. Bonded to the shell face, so the least cost and weight. | Incidental wet, with the pocket open to the air. | Humid storage. Sprayed on, not laid over — it hydrolyses and breaks down on the shelf. |
| TPU lamination | A bonded film at 0.10–0.15 mm light, 0.30 mm and up heavy — the liner for soaked kit. | Soaked kit sits for hours, or the bag must outlast a season. | A stitched seam. Stitching perforates the film, and the seam wets through. |
| Welded assembly | A pocket that holds standing water — seams welded and taped, fused, not pierced. | The brief says waterproof, not water-resistant. | Nothing in the seam. The cost is in the process, priced as its own item. |
The load path
Load a sports bag and carry it a season, and the failure shows up where the strap meets the panel. A heavier thread does not fix that — a denser stitch line perforates the cloth, so spreading the pull over an area does.
Colour and marking
What makes a squad run read as one team is repetition — one crest, in the club colour, in the same spot on every piece in the kit — together with a mark built to survive a season of wash, sweat and abrasion.



Testing
Sold on its numbers and returned on its failures — a sports bag has to hold both to the same list. What follows is the instrument, the method and the figure the run is checked to: the register a buyer can ask to see the output of.
A dry tissue goes into the compartment, the exterior takes a low-pressure spray, and the tissue is checked on completion
A static load is hung on the shoulder-strap anchor and the handle root with the bag packed to its rating
The slider is run end to end on a reciprocator — sampled inline during the run, and taken to life on the approved sample
Used kit is sealed in the wet zone for two days with the bag closed, then the clean zone is checked for transfer
Credentials, on file
Sport to quote
Name the sport, the kit it holds and the squad size. Back comes the build, the cost and a sample at a hundred pieces.
Set combinations
One shell lot, one hardware run and one print setup cover the whole range, so three separate minimums and three separate cartons collapse into one — and the sports bag pieces arrive together, not a month apart.
Buyer accounts
Accounts from the original run — a volleyball academy kitting a whole roster and a climbing team moving specialist gear — and what the sports bag had to survive.
Elena RodriguezPerformance Director, Apex Volleyball AcademyA volleyball roster carries its own weather: knee pads still damp, shoes full of court grit, a phone that has to sit somewhere dry — all in one duffle.
The load splits three ways. A welded liner fitted as an inner bag takes the wet kit, a mesh-backed well at the base takes the shoes, and a coated divider keeps the dry half dry.
The handle root took the second specification. Thirty bags lift by the same grab point, so the webbing is stitched over a reinforcement inside the end panel and signed off against a 15–20 kg pull.
A season on, thirty bags still read as one set — same shell, same liner, same grab point. That sameness is the part a roster notices.
Jack ThorntonEquipment Coordinator, Summit Extreme Climbing TeamAn alpine kit bag is not a fashion bag with a logo on it. It gets dragged over rock and snow, packed to a weighed figure, and asked to hold a rope clear of the dry kit.
The wear question went to the base and the end faces. A 1680D ballistic base panel was run against the ground cloth the bag is built to sit on, not a lab worst case.
Carry was specified the same way. Packed to the top of its range, the shoulder-strap anchor held a 15–20 kg pull for over an hour, and the main zip cleared 1,000 cycles.
Three expeditions on, the shells were still on the original hardware and the base panels had taken the rock without a repair. A third season is where an equipment list earns its keep.
From the line
Sports-bag runs, samples and reorders — the same construction, photographed where the bag actually gets carried.







Drag or scroll sideways
Sports bag questions
The questions that come up on most sports-bag enquiries. Where a figure already appears in a section above, the answer points at it, never repeats it a second time down the page.
Two patterns, and the difference is the ball. Everything a sports bag for a gym-goer needs — a vented shoe zone, a wet liner, a bottle sleeve, a hand-sized quick-draw pocket — can be built into one of those patterns, which is why a hybrid is worth running when a buyer sells into both. What does not transfer is the equipment volume: a bag built to hold a ball, a bat or a racquet in a compartment of its own is a different cut, not a bigger cut. A range usually ends up as one hybrid and one sport-specific, cut from the same shell and hardware so they read as one line.
By being held to a process, not to a sample. The liner is fixed at a single clipped point so it can be pulled out, washed and hung, and the build itself is specified in the wet-zone section above. What keeps the separation honest after a month is that it is checked on a carton pulled at random, not only on the approved sample — a liner can be watertight on the day it is signed off and still fail once it is in use.
The load concentrating in a small area. A strap stitched straight to a panel face puts the whole pull into a line of stitches, and a line of stitches in a coated or woven shell is a perforation the cloth eventually tears along. Surviving that is a question of geometry rather than thread: the pull is spread over an area instead of a line. The load-path section above states the build that does it and the static pull it is signed off against.
No, and that is the most expensive misunderstanding in this category. A PU-laminated water-repellent zip keeps rain off the teeth and is what most suppliers mean when they write waterproof zipper, but it is not hermetic. Where a pocket genuinely has to hold water, the answer is a welded assembly or a zip specified for submersion — and a stitched seam leaks through its needle holes whatever zip runs in it. If a brief asks for a waterproof pocket, the question to settle at sampling is how the seam is closed, not which zip is on it.
The sport itself, named as the piece of equipment the bag is cut around, not as a category. A sports bag tech pack has to give that item’s real dimensions — a bat barrel, a racquet head, a boot to EU 46, a mat at 61–66 cm — because those figures set the pattern before any pocket is placed. On top of that it carries the zone split and how a zone is closed, the anchor build at the strap root, the marking method and its position on a face that survives abrasion, and the piece list of any set the order ships as.
By pulling the whole order from one lot. The colour is matched to the club or school reference at the mill before the first shell is cut, and the whole order — duffle, boot bag and training pack alike — is cut from that lot, not from whatever is on the shelf that week. A reorder is matched against the original swatch, not against a bag that has been in use, because a shell fades and a swatch does not. That is what keeps a second squad kitted a season later looking like the first.
The builds are quoted separately but share one tooling and colour lot, so a set of four carries one marking setup and one shell order, not four. Where the set pays is the shell: an accessory, a wet bag or a shoe bag cut from the cloth the duffles already run adds labour and almost nothing else. The order still holds a hundred pieces per construction — the set-combinations section above shows how that lands across a gym range and a team kit.
Start a sports run
One brief starts it — the sport, the kit it holds and the order size. The build, the marking and the anchor are settled up front, so the first run is the one that ships.