Custom 35L Waterproof Dry Bag Backpack (Roll-Top Ocean Pack) – 500D PVC Tarpaulin, OEM Wholesale
Built for promotional gifts, distributor programs, and outdoor brand merchandise, this 35L roll-top waterproof dry bag backpack combines heavy-duty protection with comfortable carry. Made of 500D PVC tarpaulin (0.5mm) to resist abrasion and tearing in real outdoor use. Designed with a waterproof zipper quick-access pocket and reflective strip for safer low-light activities.
MOQ: 500 pcs for OEM/private label orders, with custom packaging supported for resale-ready distribution.
Key Benefits
Best-selling gift size: 35L – broad audience fit, easy to bundle into corporate gift kits
Heavy-duty shell: 500D PVC tarpaulin + reinforced mesh structure, 0.5mm thickness for rugged use
Reliable roll-top sealing (usage guide included) to reduce customer misuse & returns
Comfort carry system: padded shoulder straps + sternum/waist support for better load distribution
Quick access: waterproof zipper pocket for phone/keys (use-case friendly)
Safety detail: reflective strip for low-light visibility
OEM-ready: custom logo, private label, barcode/hangtag, carton marking, custom packaging
Specifications
Product Type: Waterproof Dry Bag Backpack / Ocean Pack / Roll-Top Waterproof Backpack
Main Material: 500D PVC Tarpaulin (reinforced mesh), 0.5mm
Capacity (Main SKU): 35L
Optional Capacities: 55L / 85L (bulk programs)
Colors: Green / Black / Blue / Yellow / Grey (custom color available)
Closure: Roll-top buckle closure
Features: Waterproof zipper pocket, reinforced patches, reflective strip, padded straps, waist buckle support
Applications: Corporate gifts, outdoor brand merch, rafting/river trips, beach, camping, travel, water sports
OEM/ODM: Accepted (logo, label, packaging)
Size Options
Note: The height refers to the height when unfolded; it is recommended to leave 10–20 cm at the opening to improve the sealing effect.
| Capacity | Size (H×W×D) | Net Weight | Best for |
|---|---|---|---|
| 35L (Main) | 70×34×21 cm | ~1.29–1.30 kg | Corporate gifts, day trips, beach & rafting kits |
| 55L (Optional) | 75×40×23 cm | ~1.35 kg | Multi-day trips, higher-value gift packs |
| 85L (Optional) | 84×46×26 cm | ~1.65 kg | Team events, heavy-duty gear, premium campaigns |
OEM / Private Label & Custom Packaging
MOQ: 500 pcs for OEM/private label programs.
Branding options (choose best for your artwork)
Logo printing / heat transfer
Patch / label options (for premium merch look)
Private label (inside label), hangtag, barcode label
Custom packaging supported (distributor-ready)
Individual PE/OPP bag
Retail-ready color box (optional)
Instruction card with your branding (recommended)
Carton marking for warehouse receiving & distribution
Best-fit buyers: promotional gift wholesalers, outdoor brand owners, corporate procurement, distributors.
Expert Review
1) Material & Durability
The 500D PVC tarpaulin with reinforced mesh structure is designed for rough outdoor handling-dragging on rocks, wet sand, boat decks, and repeated loading/unloading in travel. 0.5mm thickness supports a firm shape and abrasion resistance, reducing complaint risk in gift programs.
2) Waterproof Construction (Roll-Top Design)
Roll-top closure is the most reliable sealing method for dry bags when used correctly. To reduce user errors (a common reason for returns), we recommend including a branded instruction card in each unit.
3) Carry Comfort for Real Use (Gift value perception)
Unlike basic dry sacks, the backpack-style carry system improves comfort for longer carries-this is a major perceived-value upgrade for corporate gifts and merch.
4) Usability & Safety
Waterproof zipper pocket supports quick access for small essentials
Reflective strip increases low-light visibility and safety
Buyer Guide
How to Seal the Roll-Top Correctly (Standard SOP)
Place items inside and squeeze out excess air
Roll the top down at least 3–4 turns
Keep the rolled section 10–20 cm for better sealing
Buckle the top clips tightly and check the closure is even
Gift-program tip: Add a simple instruction card (we can print with your logo) to reduce misuse-related complaints.
Why 35L is the best promotional size
Fits most gift scenarios (employee kits, customer gifts, event giveaways)
Easy to ship and store in bulk
High perceived value while maintaining cost control
Comparison Table
| Item | Basic Dry Sack | This 35L Roll-Top Backpack |
|---|---|---|
| Carry comfort | Limited | Padded straps + waist support |
| Material | Thin nylon/TPU | 500D PVC tarpaulin, 0.5mm |
| Access | Hard to reach small items | Waterproof zipper quick-access pocket |
| Safety detail | Often none | Reflective strip |
| Distributor readiness | Minimal | OEM logo + private label + custom packaging |
| OEM MOQ clarity | Not stated | MOQ 500 pcs |
Procurement Info
MOQ: 500 pcs (OEM/private label)
Custom packaging: Supported (barcode, hangtag, instruction card, carton marking, optional color box)
Quotation turnaround: Send details below and we'll reply with spec confirmation + best wholesale price.
Fast RFQ – please send:
Quantity (pcs)
Color (standard or custom)
Logo file (AI/PDF) + placement request
Packaging requirement (barcode/hangtag/box/carton marking)
Destination country + target delivery time
FAQ
Q1: Is this a waterproof backpack or a dry bag?
A: It's a roll-top waterproof dry bag backpack (ocean pack style). Compared with a basic dry sack, it offers better carrying comfort and is more suitable for branded gift programs.
Q2: How do I seal the roll-top correctly?
A: Roll down 3–4 turns, keep the rolled section 10–20 cm, then buckle the clips tightly. Correct sealing is key for waterproof performance.
Q3: Why is 35L recommended for corporate gifts?
A: 35L fits most use cases (travel, beach, rafting, day trips), has strong perceived value, and is easier for bulk shipping and storage.
Q4: What material is used?
A: 500D PVC tarpaulin with reinforced mesh, 0.5mm thickness for durable outdoor use.
Q5: Do you support custom logo and private label?
A: Yes. We support OEM/private label programs including logo branding, inside label, hangtag, and barcode.
Q6: What is the MOQ for OEM orders?
A: MOQ is 500 pcs for custom logo/private label orders.
Q7: Do you support custom packaging for resale?
A: Yes. We support custom packaging such as individual bag, barcode label, hangtag, instruction card, carton marking, and optional retail box.
Q8: Is the zipper pocket fully waterproof?
A: The zipper pocket is designed as a waterproof zipper quick-access area. For best overall waterproof protection, always seal the roll-top correctly.
Q9: Can I order 55L or 85L for premium campaigns?
A: Yes. 55L and 85L are available for bulk programs. Many distributors use 35L as the main SKU and add larger sizes for premium tiers.
Q10: What information do you need for a fast quote?
A: Quantity, color, logo file/placement, packaging requirement, and destination country.
Size
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