Roll-Top Dry Bags
Simple, recognizable construction for paddling, camping, fishing, beach, travel and promotional outdoor programs.
- Commonly 2L–60L
- Single strap, handle or shoulder strap
- PVC, TPU or lightweight coated textile
Waterproof bag development & coated textile support
Dry Bags Built Around Real-World Use
DERFLEX supports custom dry bag programs for outdoor brands, importers, distributors, marine suppliers and promotional projects. Choose durable PVC, flexible TPU or lightweight coated textile constructions, then align the material, closure, capacity, carrying system and branding with the way the finished bag will actually be used.
Roll-Top & ZipperedClosure selected by protection target
2L–100L+Common development range
OEM DetailsColor, print, straps and packing
Custom roll-top dry bag direction
Material, color and final construction subject to project confirmation
PVC, TPU & coated textilesMultiple product-positioning routes
Welded seam developmentHF, hot-air or ultrasonic trials
Private-label supportLogo, color, packaging and accessories
B2B project workflowSpecification before bulk production
Product development logic
Start with the exposure level—not the bag color.
“Dry bags” cover very different products. A lightweight sack used inside a hiking backpack does not need the same structure as a river bag dragged across a raft, a marine duffel placed on a wet deck, or a zippered gear case intended for temporary submersion. The correct solution begins with use conditions, carrying load and closure design.
DERFLEX helps buyers define the shell material and processing route before sampling. For value-driven and high-wear programs, PVC coated polyester is often practical. For premium products that prioritize lower weight, softer folding and cold-weather flexibility, TPU coated nylon or polyester may be considered. Lightweight coated textiles can suit inner dry sacks and pack organization where abrasion exposure is lower.
Roll-top protection and submersible protection are not the same.
A correctly folded roll-top can provide reliable protection from rain, splash, spray and short accidental contact with water. It is not automatically designed for prolonged underwater use. A submersible bag normally requires a suitable waterproof zipper or specialized closure, sealed construction and finished-product testing under the intended conditions.
Responsible product wording: final claims such as “submersible,” an IP rating or a specific waterproof depth should only be used after the completed bag—not only the fabric—has passed the relevant test method.
Custom dry bag range
Core format
Hands-free carry
High-capacity
Water activity
Quick access
Brand programs
One category. Multiple commercial directions.
Select a product format that matches the target user, retail channel and expected load. Dimensions, liters, hardware and panel structure can be discussed around your reference sample or technical drawing.
Dry Bag Backpacks
Roll-top waterproof backpacks for commuting, motorcycling, watersports, fishing and expedition-style product lines.
- Padded or webbing shoulder systems
- External lash points and pockets
- Reinforced bottom and strap zones
Waterproof Duffels
Wide-opening duffel and gear-bag constructions for marine equipment, travel, rescue gear and wet clothing transport.
- Roll-top or water-resistant zipper options
- Carry handles and removable straps
- Heavy-duty PVC or premium TPU shells
Floating Dry Bags
Bright, visible storage bags developed for boating, swimming, kayaking and rental programs where buoyancy direction is important.
- High-visibility colors
- Optional inflation or air-retention concepts
- Product-level float testing required
Zippered Gear Cases
Compact cases for phones, tools, documents and electronics where access is prioritized over a traditional roll closure.
- Water-resistant or waterproof zipper direction
- MOLLE, belt and attachment options
- Suitable zipper selected by test target
Promotional Dry Sacks
Custom-color and logo-oriented products for events, clubs, resorts, campaigns and outdoor merchandise programs.
- Screen print, heat transfer or other logo processes
- Retail or bulk packaging
- Specification adapted to intended use
Material selection
PVC or TPU: choose by product position.
Neither material is universally better. The right choice depends on weight target, surface feel, abrasion exposure, temperature range, welding process, compliance request and project budget.
PVC Dry Bags
Durable, process-friendly and practical for broad commercial use.
- Typical role
- Rugged roll-top bags, marine duffels, fishing bags and promotional programs
- Common feel
- Firm to soft depending on formulation, thickness and embossing
- Processing
- Often compatible with HF welding and hot-air welding after production trials
- Strength
- Useful balance of abrasion resistance, structure and cost control
- Customization
- Matte, glossy, embossed, custom color and print-friendly directions
TPU Dry Bags
Premium direction for flexible, lighter and refined outdoor products.
- Typical role
- Technical dry bags, waterproof backpacks, cold-weather gear and premium programs
- Common feel
- Softer folding and flexible hand feel depending on base textile and TPU structure
- Processing
- Hot-air, ultrasonic or HF welding may be evaluated according to the construction
- Strength
- Selected when lower weight, flexibility and clean appearance are priorities
- Customization
- Colored, transparent, matte, glossy and textile-backed options can be discussed
Configuration guide
Match capacity, closure and construction to the job.
The examples below are common project directions, not fixed specifications. Final values should be confirmed through sample evaluation and finished-product testing.
| Product direction | Common capacity | Material route | Closure | Useful design details | Typical buyers |
|---|---|---|---|---|---|
| Pack organizer dry sack | 2L–20L | Lightweight coated nylon/polyester or TPU textile | Roll-top | Low-profile buckle, translucent panel, color coding | Hiking and travel brands |
| General outdoor dry bag | 5L–40L | PVC or TPU coated fabric | Roll-top | Carry handle, removable shoulder strap, printed logo | Outdoor distributors and retailers |
| Fishing / kayak bag | 10L–60L | Abrasion-oriented PVC or flexible TPU structure | Roll-top or selected zipper | Reinforced bottom, lash points, visible color | Fishing and paddle-sports brands |
| Waterproof backpack | 15L–45L | TPU coated textile or PVC coated polyester | Roll-top / zipper combination | Padded straps, sternum strap, external pocket | Motorcycle, commute and watersports channels |
| Marine / expedition duffel | 40L–100L+ | Heavy-duty PVC or project-specific TPU | Large roll-top or technical zipper | Webbing cradle, carry handles, ID window, reinforced base | Marine suppliers, rescue and commercial users |
Product and production visuals
From material roll to finished bag concept.
DERFLEX combines coated textile knowledge with project coordination for custom waterproof bag programs. The final production route is selected according to bag design, quantity and processing requirements.
Durable PVC bag direction
Useful for gear duffels, marine storage and value-focused waterproof bag programs.
Roll-goods manufacturing support
Material structure, surface finish, roll width, color and packaging can be aligned with the converting factory’s welding, cutting and printing workflow.
OEM workflow
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Reduce uncertainty before the bulk order.
A clearer brief leads to faster material matching, more meaningful samples and fewer changes after tooling or printing begins.
Define the use
Share the bag type, capacity, carrying load, water exposure, temperature range and intended sales channel.
Match the structure
Compare PVC, TPU or lightweight coated textile options together with closure, seam and reinforcement design.
Confirm the sample
Review hand feel, folding, weld quality, logo appearance, strap loading and finished-bag water performance.
Prepare production
Confirm color tolerance, packaging, labeling, inspection criteria, quantity and repeat-order requirements.
Buyer preparation
What to send for a more useful quotation.
Project information checklist
- Bag style, dimensions or target capacity
- Reference photo, drawing or existing sample
- Preferred PVC, TPU or “recommend a material” direction
- Closure type and expected protection level
- Logo process, Pantone color and surface finish
- Straps, buckles, zippers, pockets and reinforcement points
- Estimated quantity, packaging format and destination market
- Any requested compliance or finished-product test standard
Not sure which dry bag material to choose?
Send DERFLEX your target product, application and reference design. The team can discuss practical material and processing directions for sample evaluation.
Send Your Requirement
Related DERFLEX resources
Continue your dry bag sourcing research.
These six related pages connect finished-product planning with waterproof material selection, welding and application-specific design.
Frequently asked questions
Dry bag sourcing FAQ
What material is commonly used to make dry bags?
PVC coated polyester, TPU coated nylon or polyester, and lightweight PU/TPU-coated textiles are common choices. PVC is often selected for durability and commercial cost control, while TPU is considered for lower weight, flexibility and premium positioning. Lightweight coated textiles are useful for pack-organizer sacks with lower abrasion exposure.
Are all roll-top dry bags suitable for submersion?
No. Roll-top bags are generally developed for rain, splash, spray and short accidental water exposure. Long or deep submersion can allow water to enter through the closure. A submersible claim requires a suitable closure, sealed construction and finished-product testing.
Can DERFLEX support custom logos and colors?
Custom colors, Pantone matching, matte or glossy surfaces, selected embossing, printing and private-label packaging can be discussed according to the material, logo process and order quantity. A physical sample is recommended for visual approval.
Can PVC and TPU dry bag fabric be welded?
Many PVC and TPU coated fabrics are intended for welding. Depending on the material construction and factory equipment, HF, hot-air or ultrasonic welding may be evaluated. Welding temperature, pressure, speed and seam width should be tested with the actual production machine.
What dry bag sizes can be developed?
Common dry bag programs range from compact 2L organizers to 100L or larger gear duffels. Capacity alone does not determine dimensions; shape, opening width, roll allowance, seam layout and carrying load should all be included in the pattern design.
What tests should be considered before bulk production?
Depending on the product, buyers may consider seam peel strength, water ingress, hydrostatic fabric testing, strap loading, buckle function, zipper leakage, abrasion, color fastness, cold folding and repeated roll-top cycling. The final test plan should match the claims and intended market.
Does DERFLEX sell material rolls or finished custom bags?
DERFLEX’s core strength is coated textile and waterproof material supply. For custom dry bag programs, the team can discuss material matching, sample development and coordinated OEM production according to the project scope. Confirm whether your quotation requires roll goods, converted components or finished bags.
Develop a dry bag that fits your market.
Tell DERFLEX the product type, capacity, use environment, material preference, logo, quantity and destination. Receive a project-oriented discussion instead of a generic one-size-fits-all recommendation.
Product performance, test level, compliance and final claims depend on the confirmed material, bag construction, closure, manufacturing process and finished-product verification.