Your Trusted Custom Dry Bags Manufacturer
High-performance waterproof dry bags for marine, outdoor, and professional use. Expert OEM/ODM manufacturing with 15+ years of experience in radio-frequency welding.
RF welded waterproofing
Seam integrity built for real wet environments
Closure engineering
Roll-top vs zipper vs purge valve trade-offs
Leak-risk control
Failure mode prevention + practical test plans
Export execution
AQL inspection + labeling + carton marks
15+
Years experience
7–10 days
Sampling lead time
30–45 days
Bulk lead time
AQL inspection
QC standard
Certifications & compliance support
• ISO 9001 quality management (available upon request)
• BSCI / social compliance audit support (available upon request)
• REACH / RoHS material compliance support for target markets
• AQL final inspection report for shipment-level verification
• BSCI / social compliance audit support (available upon request)
• REACH / RoHS material compliance support for target markets
• AQL final inspection report for shipment-level verification
Spec snapshot
A fast engineering view of what matters for sourcing, quoting, and repeatable production.
| Item | Typical | Notes |
|---|---|---|
| Waterproof target | IPX6 / IPX7 / IPX8 (by spec) | Set target early to choose seams and closures correctly |
| Seam method | RF welding (recommended) / taped seams | Welding reduces leakage paths and improves repeatability |
| Closure choice | roll-top / waterproof zipper / purge valve | Closure and end details are common leak points |
| Typical volume | 5L–100L+ | Small volumes focus on portability; large focus on handle/strap load zones |
| Hardware for marine | corrosion-aware hardware options | Saltwater programs need stricter hardware validation |
| Typical MOQ | 300–800 pcs | Depends on materials, printing, and hardware set |
Common failure modes & prevention
This section is written from real production and QC. It helps you spec the right construction and avoid claim risk.
| Failure mode | Why it happens | How we prevent it |
|---|---|---|
| Leak at zipper ends | Zipper-end geometry creates micro-gaps and stress at corners | Reinforce end-stops, optimize corner shaping, validate by immersion test |
| Roll-top seepage | Insufficient roll count or wrong buckle alignment in real use | Define roll count in spec; use buckle positioning that guides correct closure |
| Seam pinholes | Contamination or unstable welding parameters | Material cleaning control + welding parameter records + inline checks |
| Anchor tear-out | High load without reinforcement map | Reinforcement patches + bar-tack count control + pull tests on anchors |
| Hardware corrosion returns | Saltwater exposure with unvalidated plating/finishes | Program-level hardware selection + validation plan + packaging drying control |
Waterproof rating options (IPX)
We can engineer materials, seams, and closures to match different waterproof performance targets.
| Level | Meaning | Factory notes |
|---|---|---|
| IPX6 | Powerful water jets | Best for heavy rain / splashing. Usually roll-top + welded seams. |
| IPX7 | Temporary immersion | Best for kayaking / rafting. Recommend RF welding + strict closure spec. |
| IPX8 | Continuous immersion (by spec) | Submersible designs may require airtight zipper or purge valve + pressure testing. |
Capacity & dimensions reference
Standard size options for dry bags. We can also customize dimensions to fit your specific gear.
| Volume | Typical Dimensions | Best For |
|---|---|---|
| 5L - 10L | ø18cm x 35cm / ø20cm x 45cm | Essentials, keys, phones, small towels |
| 15L - 30L | ø24cm x 50cm / ø28cm x 60cm | Day trips, clothes, towels, snacks |
| 40L - 60L | ø30cm x 75cm / ø35cm x 85cm | Multi-day trips, camping gear, sleeping bags |
| 100L+ | ø45cm x 110cm+ | Expedition use, large equipment, group gear |
Seams & closures (engineering choices)
Waterproof or odor-proof performance usually fails at seams and zippers. This table sets the right expectations early.
| Element | Options | Best for | Notes |
|---|---|---|---|
| Main body seams | RF welding / stitched + taped (by spec) | true waterproof / cost-driven water-resistant | Welded seams provide the most stable bulk consistency |
| Top closure | 3-fold roll-top / zipper top / flap | outdoor waterproof / fast access / mixed protection | Roll-top requires correct roll count; define spec in tech pack |
| Zipper ends | end-stop reinforcement + seam shaping | zipper-top dry bags | Most leaks happen at zipper ends and corners |
| D-rings & strap anchors | reinforcement patch + webbing route | heavy load and backpack straps | Define anchor map to avoid tear-out failures |
Materials & fabrics
Material choice drives performance, durability, finishing, and target price point.
| Fabric | Waterproof | Cost | Notes |
|---|---|---|---|
| 500D PVC Tarpaulin | IPX6 / IPX7 Rated | $2.50 - $4.00 / m² | Industry standard for durability and water resistance. |
| 420D TPU-Coated Nylon | IPX7 / IPX8 Rated | $5.00 - $8.50 / m² | Lighter, more flexible, and better eco-profile than PVC. |
| 840D Double TPU Laminated | Fully Submersible | $9.00 - $12.00 / m² | Maximum puncture resistance for extreme conditions. |
Manufacturing & QC process
1
Material Cutting
Precision CNC cutting of PVC or TPU panels based on CAD designs.
2
RF Welding
High-frequency welding creates seamless, airtight, and watertight bonds.
3
Component Assembly
Attachment of D-rings, buckles, and straps using reinforced stitching or welding.
4
Pressure Testing
Inflation or immersion tests to ensure 100% waterproof integrity.
5
Final QC & Packing
Visual inspection and cleaning before final packaging for shipment.
Quality & testing
• Hydrostatic Head Test: Verifying fabric water resistance up to 10,000mm+.
• Submersion Testing: Ensuring no leaks during prolonged underwater exposure.
• Tensile Strength Test: Testing the durability of seams and attachment points.
• Salt Spray Test: Verifying corrosion resistance of hardware for marine use.
• Submersion Testing: Ensuring no leaks during prolonged underwater exposure.
• Tensile Strength Test: Testing the durability of seams and attachment points.
• Salt Spray Test: Verifying corrosion resistance of hardware for marine use.
Factory & testing preview
We can share real production, QC, and packaging videos for your project. Submit an inquiry and ask for the factory video pack.
Use cases
• Marine & Boating: Protecting gear from spray and submersion.
• Kayaking & Rafting: Essential gear for river expeditions.
• Camping & Hiking: Keeping sleeping bags and clothing dry in wet weather.
• Emergency Services: Reliable storage for rescue and medical equipment.
• Adventure Travel: Durable luggage for unpredictable environments.
• Kayaking & Rafting: Essential gear for river expeditions.
• Camping & Hiking: Keeping sleeping bags and clothing dry in wet weather.
• Emergency Services: Reliable storage for rescue and medical equipment.
• Adventure Travel: Durable luggage for unpredictable environments.
Reference projects
Example programs we can support. Share your target positioning and we will propose a spec roadmap.
Outdoor retail brand (USA)
TPU 20L roll-top dry bags with reflective logo; 15,000 pcs annual program.
Watersports distributor (UK)
PVC 40L backpack dry bags with padded straps; packed with barcode labels.
Expedition gear importer (Germany)
100L heavy-duty duffel dry bags with reinforced base and lash points.
RFQ checklist (to quote faster)
• Target waterproof level (IPX6/7/8) and user scenario (marine/kayak/camping)
• Volume range and size breakdown (e.g., 10L/20L/40L mix)
• Closure preference (roll-top vs zipper) and access priorities
• Carrying configuration (single strap/backpack straps/duffel handles)
• Material preference (PVC vs TPU) and eco positioning requirements
• Branding method + placement + abrasion expectation
• Any required tests (immersion, leak test, salt spray) and claim language scope
• Volume range and size breakdown (e.g., 10L/20L/40L mix)
• Closure preference (roll-top vs zipper) and access priorities
• Carrying configuration (single strap/backpack straps/duffel handles)
• Material preference (PVC vs TPU) and eco positioning requirements
• Branding method + placement + abrasion expectation
• Any required tests (immersion, leak test, salt spray) and claim language scope
Frequently asked questions
Q: What is your standard lead time for custom dry bags?
A: Sample production typically takes 7-10 days. Bulk production takes 30-45 days depending on the order volume and customization complexity.
Q: Do you offer private labeling and custom colors?
A: Absolutely. we offer silk-screen printing, heat transfer, and rubber patches. Custom colors are available for orders meeting our minimum material quantity.
Q: Can you manufacture to specific IPX waterproof ratings?
A: Yes, we can engineer bags to meet IPX6 (heavy splashing), IPX7 (temporary immersion), or IPX8 (continuous submersion) standards.
Q: What is your minimum order quantity (MOQ)?
A: Our standard MOQ is 500 pieces per style/color, but we can discuss smaller quantities for established brands or specific material availability.
Explore by market
Start custom dry bags production
Send your requirements and get a structured RFQ checklist and a manufacturing plan.