Radio-frequency welded PVC dry bags — roll-top backpacks, duffles, totes and waist bags with no needle holes anywhere in the body. Genuinely waterproof, not "water-resistant," and a construction commodity sewing lines don't run. From 1,000 pieces with your logo.
As a custom dry bag manufacturer we build genuinely waterproof bags the only way it can be done: PVC-coated fabric with radio-frequency (RF) welded seams. Webbing and padding are stitched to a separate waterproof layer, which is then welded onto the bag body — so the body itself carries zero needle holes. Roll-top backpacks, dry duffles up to 76 cm, a dry tote and a welded waist bag, all brandable from 1,000 pieces. RF welding is a dedicated production line most sewing factories don't run — which is why "waterproof" from other suppliers usually means sewn-and-coated.
| Construction | Seams | Water rating | Honest use case |
|---|---|---|---|
| RF-welded PVC (this page) | Fused — no needle holes | Waterproof; roll-top seals the mouth | Kayaking, motorcycling, boat decks, rain-season commuting |
| Sewn TPU-coated | Stitched — needle holes at every seam | Water-resistant | Daily rain and splash — most of our backpack line |
| Sewn + PU coating | Stitched | Shower-resistant | Everyday bags, brief exposure |
If a supplier calls a sewn bag "waterproof," ask them where the needle holes went. The construction difference is also why dry bags are their own type, not a backpack feature.
One from each welded family — all 7 styles live on the shelf. Ask by code and a sample ships this week.
YT-10043
YT-10044
YT-02161
YT-08034Welded builds and the adjacent custom work — jump to what fits your brief.
Construction: PVC fabric with RF-welded seams — fused, not sewn — so the body has zero needle holes. Webbing is stitched to a separate layer that's then welded on.
Sewn TPU bags are water-resistant; every stitch line is a row of holes. Welded bags have no holes — waterproof, full stop.
Screen print, heat transfer, or a welded-on patch. Never embroidery through the body — needle punctures leak.
1,000 pieces per style; styles can be combined into one program with matching colors.
Style code, quantity and logo in one message; prices and a sample plan come back the same day.
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