A dry bag supplier may be a factory or a trading company, and the difference changes your price, MOQ and control. Buy from a factory when you need custom specs and welding control; use a trader when you want aggregated small orders and flexible mixed SKUs.
People searching for "dry bag supplier" usually want a direct, practical answer - and this page delivers one. This guide walks through how to evaluate a dry bag supplier - the checks that matter, the numbers to verify, and the questions that separate a dependable production partner from a middleman. It covers MOQ, lead time, sampling, testing, materials and export terms so you can source with confidence.
Factory vs trading company
A factory gives you direct control over material, welding and cost, but often wants a larger MOQ. A trader can combine orders, lower the MOQ and manage logistics, but adds a margin and sits between you and the real welder.
Terms worth negotiating
Lock in the payment terms, the sample policy, the unit price at your quantity, and who owns the tooling and design. Written terms prevent the classic dispute where a trader changes price after the first shipment.
How to verify who you are talking to
Check the business license, ask for a factory address and a video call, and match the name on the invoice to the producer. A quick video of the floor is worth more than a warehouse certificate.
Working with a dedicated project manager
A good dry bag supplier supplier assigns one person to your account who tracks the spec, sample, production and shipping. That single point of contact prevents the telephone-game mistakes that happen when instructions pass through several people.
Confirm communication cadence up front - weekly updates, photo reports from production, and approval checkpoints. Clear communication is often the difference between an on-time order and a costly delay.
Quality control and AQL inspections
Most dry bag supplier programs use AQL (Acceptable Quality Limit) sampling before shipment. This means inspecting a statistically defined number of bags for seams, closures, printing and waterproofing rather than checking every unit.
Agree the AQL level and defect definitions before production, and ask for a pre-shipment inspection report. A supplier that resists a third-party or buyer inspection is a red flag.
MOQ and lead time explained
MOQ for a dry bag supplier usually starts at 500 pieces per design and color, because material rolls and production setup are priced by volume. OEM designs with new tooling often start around 500 pieces or more, while ODM stock programs can sometimes begin lower.
Lead time splits into sampling and bulk. A pre-production sample typically takes 6--10 day, and bulk production takes 35-50 days after approval. Add 3-6 weeks for sea freight or 5-10 days for air freight, and build buffer into your calendar for printing approval.
Capacity, quality and how to verify both
Capacity claims only matter when they are dated and evidenced. Ask for the number of production lines, monthly output and a recent third-party audit such as SGS. A stated figure without a source or verification date is marketing, not capacity.
Quality systems are equally important. Confirm there is incoming material inspection, in-line QC and a final AQL inspection, and that every dry bag supplier order is leak-tested before packing. A supplier that can describe its QC gates is far more trustworthy than one that only promises good quality.
Waterproof testing and quality control
Waterproofing is the product's core promise, so ask exactly how the factory tests it. Reputable dry bag supplier operations use submersion jigs, inflation-and-submersion to reveal bubbles, and seam pull tests, and they can share test reports for IPX6, IPX7 or IPX8 conditions.
In production, every batch should be sampled for leaks, not just the prototypes. Confirm the sampling plan - typically AQL-based - and whether the factory performs a 100% visual and closure check before packing. Documented testing is the difference between a dry bag and a bag that looks dry.
Sampling: why it protects your order
A pre-production sample is a single bag made to your final specification before bulk begins. It lets you confirm material, color, closure, printing placement, hardware and waterproofing before hundreds or thousands of units are produced.
Never skip the sample on a dry bag supplier order, even if the factory has an existing design. The sample fee is typically credited back against the bulk order, so it effectively costs nothing once you proceed - and it can save you from an entire container of a wrong specification.
| Type | Best for |
|---|---|
| Factory | Custom, large MOQ |
| Trader | Small orders, mixed SKUs |
| Agent | Sourcing + QC support |
| Step | What to do | Why it matters |
|---|---|---|
| 1. Shortlist | Pick 3-5 dry-bag specialists | Filters out general bag makers |
| 2. Verify | Request audit report or live tour | Confirms capacity is real |
| 3. Spec | Fix material, size, closure, printing | Makes quotes comparable |
| 4. Sample | Order a pre-production sample | Locks the final spec |
| 5. Test | Confirm leak/IPX test method | Protects the waterproof promise |
| 6. Order | Agree MOQ, lead time, QC, terms | Prevents disputes later |
| Criterion | What to verify | Red flag |
|---|---|---|
| Specialization | Dry bags are a core product line | Only generic fashion bags |
| Welding | RF / high-frequency machines on site | Only sewing machines |
| Capacity | Dated SGS or audit report | Unverified big numbers |
| Testing | Submersion / inflation leak tests | No test method described |
| Samples | Pre-production sample offered | No sample or sample for sale only |
| Compliance | REACH / RoHS documents available | Verbal assurances only |
| Cost driver | Typical share | Notes |
|---|---|---|
| Material | 40-60% | Film is the largest cost |
| Labor | 15-25% | Welding and assembly |
| Hardware | 5-15% | Buckles, rings, zippers |
| Printing | 3-10% | Depends on method |
| Packaging | 2-8% | Poly bag to retail box |
| Term | What it means |
|---|---|
| FOB | Buyer pays freight from port |
| CIF | Cost, insurance and freight included |
| DDP | Seller handles duties and delivery |
Why a tech pack matters more than a price quote
A price quote without a signed tech pack is a guess. A proper tech pack includes a flat drawing with dimensions in millimetres, fabric specification (weight g/m2, thickness mm, coating type), closure type, hardware SKUs, logo placement with PMS colours, packing details and the approved golden sample reference.
Without this, the factory will default to its cheapest existing construction, and you will discover at sample stage that the fabric is thinner, the strap is shorter and the welds are narrower than you imagined. The rework rounds that follow cost more than the tech pack ever would have.
If you do not have an in-house designer, most factories including the one behind this site will draft the tech pack for you based on a reference bag or a sketch. Chargeable USD 80-200 per design, credited back against the bulk order.
MOQ tiers and how quantity moves unit price
OEM dry bag programs almost always start at MOQ 500 pieces per design per colour, because the factory has to open a fresh roll of fabric, cut a fresh pattern set and reset the welding line for that one SKU. Below 500 units the setup cost is spread too thinly and the per-piece price jumps sharply.
At 500 pieces you are at the entry OEM price. At 1,000 pieces most factories will drop the unit price by 8-14% because cutting, welding and packing all run faster once the line is set. At 3,000-5,000 pieces the discount widens to 15-22%, and above 5,000 pieces material purchasing itself becomes cheaper because the mill sells the roll at a bulk rate. Ask the supplier for a tiered price table at 500 / 1,000 / 3,000 / 5,000 so you can model your own break-even.
A common mistake is locking a 500-piece order when a 1,000-piece order would have landed the unit price low enough to fund a marketing campaign. Work backwards from your sell-through forecast, not from the MOQ itself.
Sample costs and how they are credited
A custom dry bag sample typically costs USD 30-80 per piece depending on complexity, plus USD 15-40 for express courier. The sample fee is usually credited back against the bulk order once you place it.
If the sample requires a new cutting die (for a non-standard shape), the die cost USD 150-400 is separate and is not always credited. Ask up front which fees are refundable.
Order two samples: one for you to test, one to send to your product photographer. Shipping both to different addresses doubles the courier cost but saves a week of back-and-forth.
Payment terms and what is normal for a new buyer
Standard terms for a new dry bag buyer are 30% T/T deposit on order confirmation and 70% T/T balance against the copy of the bill of lading. Some factories will accept L/C at sight for orders above USD 30,000. PayPal or Western Union is rare for bulk because of fees.
After you have completed two or three clean orders, factories will often negotiate to 30/30/40 (deposit / mid-production / against B/L copy) or even open credit for repeat seasonal orders. Do not expect this on your first order.
Beware of suppliers asking for 100% T/T in advance with no escrow. A legitimate factory will always split the payment so both sides have skin in the game.
Packaging, carton dimensions and landed cost math
A single 20L roll-top dry bag packs flat into a polybag at roughly 28 x 22 x 4 cm and weighs 380-480 g depending on fabric thickness. A standard export carton holds 40-60 pieces and measures about 55 x 45 x 40 cm at 18-22 kg gross. These numbers drive the sea freight quote.
Landed cost = unit price + inland trucking + export customs + ocean freight + insurance + import duty + DDP clearance + last-mile delivery. For a US importer at a 5,000-piece order this typically adds USD 1.8-3.2 per bag on top of the factory price. For EU importers REACH testing and duty add another USD 1.0-1.8.
Always ask the factory for a CIF quote to your nearest port and a DDP quote to your warehouse side by side. The DDP number is what your accountant actually cares about, and it is easy to underestimate if you only compare FOB prices. For in-house manufacturing capacity, tooling and export documentation, see JUNYUAN BAGS in Quanzhou.
People also ask
What is the difference between waterproof and water resistant?
Waterproof means it keeps water out under submersion or jets; water resistant means it resists light rain and splashes but will leak under pressure or immersion.
What certifications should I ask a dry bag supplier for?
REACH and RoHS material compliance for the EU, plus a third-party audit such as SGS. Ask for documents rather than verbal assurances, and check the test date.
What does IPX8 mean on a dry bag?
IPX8 means the bag survives continuous immersion beyond 1 meter under manufacturer-specified conditions. The depth and duration are only meaningful if stated.
How much does a custom dry bag cost?
A simple PVC dry bag can cost a few dollars per unit at volume, while a premium TPU bag with custom hardware and printing costs more. Unit price depends on material, size, closure and quantity.
What does waterproof mean on a dry bag?
Waterproof means the bag keeps water out under stated conditions. On a dry bag it is usually expressed as an IPX rating such as IPX7 or IPX8, which specifies immersion depth and time.
What is the HS code for dry bags?
Dry bags generally classify under travel goods or bags headings such as 4202. Confirm the exact 10-digit code with your freight forwarder and the destination customs authority.
What does IPX7 mean on a dry bag?
IPX7 means the bag withstands immersion in 1 meter of water for 30 minutes. It is a common and meaningful standard for dry bags.
What does IP68 mean on a dry bag?
IP68 combines dust-tight (6) and immersion-protected (8) ratings. The 8 does not specify a universal depth; the test conditions must be stated.
Key takeaways
- Choose dry bag supplier by fixing the activity, size, material and closure before comparing options.
- Verify waterproofing with a stated IPX rating and a real test method, not a label.
- For bulk orders, confirm MOQ, lead time and a pre-production sample before committing.
- Match material to conditions: TPU for cold and UV, PVC for abrasion, coated nylon for weight.
- A physical pre-production sample is the only reliable way to lock material, color and printing.
- Store dry bags loose and shaded, and re-test the seal before trusting them with electronics.
Related guides
- What is a dry bag?
- Dry bag materials: TPU vs PVC vs nylon
- IPX / IP68 waterproof ratings
- Types of dry bags
- OEM dry bags
Step by step
- Shortlist three to five dry bag supplier specialists rather than general bag makers.
- Request a dated audit report or a live factory tour to verify capacity.
- Fix your full specification - material, size, closure, printing and packaging.
- Order a pre-production sample and approve it before bulk begins.
- Confirm waterproof testing, MOQ, lead time, payment terms and the HS code.
- Agree QC standards and a pre-shipment inspection before production starts.
Specification checklist
- Fix the specification first - material, size, closure, printing and packaging - so quotes are comparable.
- Verify waterproofing with a stated IPX rating and a real test method, and confirm the batch sampling plan.
- Order a pre-production sample and approve it before bulk production begins.
- Confirm MOQ, lead time, payment terms and the correct HS code before you commit.
- Match the material to the conditions: TPU for cold and UV, PVC for abrasion, coated nylon for weight.
- Ask for a dated test report and a pre-shipment inspection (AQL) for waterproofing and seams.
- Keep the most valuable items in an inner pouch as a second layer of protection.
- Rinse, dry and store the bag correctly to extend its lifespan season after season.
Bottom line
The bottom line is that a dependable dry bag manufacturer is found, not stumbled upon. Verify specialization, capacity and testing with dated evidence, run a pre-production sample, and fix the specification before you compare quotes. A little diligence up front prevents an entire container of a wrong specification later. For "dry bag supplier", this is the summary that matters most.
Frequently Asked Questions
Q1. What is the difference between waterproof and water resistant?
Waterproof means it keeps water out under submersion or jets; water resistant means it resists light rain and splashes but will leak under pressure or immersion.
Q2. What certifications should I ask a dry bag supplier for?
REACH and RoHS material compliance for the EU, plus a third-party audit such as SGS. Ask for documents rather than verbal assurances, and check the test date.
Q3. What does IPX8 mean on a dry bag?
IPX8 means the bag survives continuous immersion beyond 1 meter under manufacturer-specified conditions. The depth and duration are only meaningful if stated.
Q4. How much does a custom dry bag cost?
A simple PVC dry bag can cost a few dollars per unit at volume, while a premium TPU bag with custom hardware and printing costs more. Unit price depends on material, size, closure and quantity.
Q5. What does waterproof mean on a dry bag?
Waterproof means the bag keeps water out under stated conditions. On a dry bag it is usually expressed as an IPX rating such as IPX7 or IPX8, which specifies immersion depth and time.
Q6. What is the HS code for dry bags?
Dry bags generally classify under travel goods or bags headings such as 4202. Confirm the exact 10-digit code with your freight forwarder and the destination customs authority.
Q7. What does IPX7 mean on a dry bag?
IPX7 means the bag withstands immersion in 1 meter of water for 30 minutes. It is a common and meaningful standard for dry bags.
Q8. What does IP68 mean on a dry bag?
IP68 combines dust-tight (6) and immersion-protected (8) ratings. The 8 does not specify a universal depth; the test conditions must be stated.
Q9. Do I need a factory audit before ordering dry bags?
Not for a first small trial order, but an audit or an existing third-party report becomes important before large or long-term production.
Q10. What is a purge valve?
A one-way valve that lets air escape after rolling, compressing the bag for packability.
Q11. What is the difference between a trading company and a factory?
A factory owns the production lines; a trading company sources from factories. A factory usually offers better pricing and control, while a trading company may offer broader product range.
Q12. Can a dry bag factory help with design?
Yes. ODM factories offer proven designs you can customize, and many provide design, sampling and packaging support for brands without an in-house designer.
Q13. What questions should I ask a dry bag factory?
Ask which dry bag types they make, what welding method they use, how they test waterproofing, their MOQ and lead time, and whether they provide REACH/RoHS or audit reports.
Q14. What is the difference between IP67 and IP68?
IP67 survives 30 minutes at 1 meter. IP68 survives beyond 1 meter or longer immersion, but the exact depth and time depend on the manufacturer's spec.
Q15. What is the difference between a dry bag and a dry sack?
They are the same product. Dry sack is the more common British and outdoor-store term, while dry bag is used more in the US.
Q16. Can I visit a dry bag factory?
Yes. Serious suppliers welcome factory visits or provide a live video tour. Before visiting, prepare your spec, quantity and a checklist of what to inspect.
Q17. How do I clean a dry bag?
Rinse with fresh water, wipe with mild soap, and air-dry fully before storing. Avoid harsh solvents and keep zipper tracks clean of sand.
Q18. What are the different types of dry bags?
Roll-top, zipper, backpack, tote, phone, floating, waist pack, duffel and pouch styles, each built for a different activity and access need.
Q19. How do I pack a dry bag?
Pack dense items at the bottom, soft items on top, leave fabric for the roll, and squeeze out excess air before closing.
Q20. What is REACH compliance for dry bags?
REACH is the EU regulation restricting hazardous chemicals. REACH-compliant materials meet EU limits for substances such as phthalates.