25L Waterproof Backpack with Dual-Slider Airtight Zipper (IPX7)

Sealock manufactures the 25L Waterproof Backpack with Dual-Slider Airtight Zipper, model SL-E698, for hunters, anglers and outdoor users who want dry-bag protection without dry-bag inconvenience. As a welded waterproof-bag factory, we seal the main compartment with a genuine airtight waterproof zipper running two sliders across the curved top — so this waterproof backpack holds an IPX7 rating while letting you open from either end, or crack it open in the middle for one-handed access. Add a sealed front pocket, lash webbing, a channelled padded back and four colourways including marsh-grass camo, and it works as well in a blind as it does on a commute.

Dual-Slider Airtight Zipper, IPX7

Two sliders run on one airtight waterproof zip track across the curved top of the pack. Open from the left, from the right, or part both sliders in the middle to reach in one-handed without unzipping the whole bag — a real advantage when you are holding a rod, a call or a phone. The zipper is a genuine sealed airtight track, not a coated coil zip under a flap, and the body is high-frequency welded with no exposed stitching. Rated IPX7, it keeps gear dry through heavy rain, spray and brief immersion. We verify the seal on every unit with a full water-immersion test, submerging the closed pack for more than two hours and confirming the inside stays dry.

Sealed Front Pocket and Lash Webbing

A vertical waterproof zip pocket on the front holds a phone, licence, calls or keys sealed and separate from the main compartment, with an oversized D-ring pull you can work wearing gloves. Below it, a row of wavy lash webbing takes a carabiner, light, glove clip or tool, and side compression straps cinch the load down when the pack is part full.

Four Colourways, Including Camo

The SL-E698 comes in four finishes that cover different retail channels from one tooling: deep navy for urban and travel, marsh-grass camo for waterfowl and field use, grey multicam for tactical and everyday carry, and heather purple for lifestyle. All four share the same welded shell, airtight zipper and hardware, with yellow accents on the zipper pulls, sternum strap, lash webbing and logo patch.

Channelled Padded Back and Harness

The back panel uses horizontal channelled foam that cushions the load and opens airflow gaps against your back, and contoured padded shoulder straps with breathable mesh facing spread the weight. A yellow sternum strap with a quick-release buckle stops the straps sliding on the move, and a reinforced top grab handle plus strap D-rings make the pack easy to lift, hang and clip to.

1. Engineering Specifications

Item	Specification
Brand	SEALOCK
Model No.	SL-E698
Product Name	Waterproof Backpack with Dual-Slider Airtight Zipper
Product Category	Waterproof Backpack / Daypack
Construction Type	Structured Zip-Opening Waterproof Daypack
Manufacturing Process	High-Frequency Welded Seams
Waterproof Structure	Welded Body + Airtight Waterproof Zipper
Main Closure	Dual-Slider Airtight Waterproof Zipper (curved top, two-way)
Waterproof Rating	IPX7
Dimensions	27.5 × 16.5 × 54 cm
Capacity	25L
Net Weight	1.05 kg
Front Pocket	Vertical Waterproof Zip Pocket with D-Ring Pull
Side Storage	Dual Side Pockets
Attachment	Front Lash Webbing · Side Compression Straps · Shoulder D-Rings
Back System	Horizontal Channelled Padded Back Panel
Carry System	Contoured Mesh-Faced Padded Straps + Sternum Strap + Top Grab Handle
Colour	Navy · Marsh-Grass Camo · Grey Camo · Heather Purple
Country of Origin	Guangdong, China

2. Material Specifications

Component	Material	Purpose
Outer Shell	TPU Laminated Waterproof Fabric (printed camo / solid)	Waterproofing & abrasion resistance
Seams	High-Frequency Welded	Needle-hole-free waterproof joints
Main Zipper	Airtight Waterproof Zipper, dual slider	Seals the main compartment to IPX7 with two-way access
Pocket Zipper	Waterproof Zipper	Sealed quick-access front storage
Zipper Pulls	Moulded Pulls with D-Ring Loops	Operable with wet or gloved hands
Lash Webbing	Nylon Webbing, wave-stitched	Attachment points for tools and accessories
Back Panel	Channelled Foam with Fabric Cover	Cushioning and airflow against the back
Shoulder Straps	Contoured Foam Padding with Air-Mesh Facing	Load distribution and breathability
Sternum Strap	Webbing with Quick-Release Buckle	Stabilizes the harness on the move
Logo Patch	Moulded Rubber Patch	Durable, weatherproof branding
Handle	Reinforced Nylon Webbing	Lifting and hanging

3. Functional Specifications

Feature	Description
Waterproof Protection (IPX7)	Airtight zipper on a welded body keeps gear dry through heavy rain, spray and brief immersion.
Two-Way Zip Access	Dual sliders open from either end or part in the middle for one-handed reach.
Sealed Front Pocket	Waterproof zip pocket keeps phone, licence and keys dry and separate.
Glove-Friendly Hardware	Oversized D-ring pulls work with cold, wet or gloved hands.
Gear Attachment	Front lash webbing and shoulder D-rings take clip-on tools and accessories.
Load Compression	Side compression straps stabilize a part-full pack.
Back Ventilation	Channelled padding and mesh-faced straps reduce sweat build-up.
Concealment Options	Marsh-grass and grey camo finishes suit waterfowl, field and tactical use.
Easy Maintenance	Coated surface wipes clean of mud, marsh water and blood.

4. Customization / OEM Specifications

Option	Available
Fabric Colour / Print	Four stock finishes · custom camo pattern · custom Pantone
Fabric Type	TPU or PVC laminated, denier and thickness to spec
Capacity / Dimensions	Customizable
Zipper Configuration	Dual-slider airtight (standard) · single slider · water-resistant laminated
Laptop Sleeve	Optional (padded / shockproof)
Internal Divider & Pockets	Optional
MOLLE / Laser-Cut Webbing	Optional
Hip Belt	Optional
Reflective Trim	Optional
Accent Colour	Customizable (zipper pulls, sternum strap, lash webbing, logo patch)
Logo Methods	Rubber patch · Silk-screen · Heat-transfer · Welded patch · Embroidery
Full Custom Development	Ground-up development from sketch, sample or target spec
MOQ	300 pcs
Sample Lead Time	7–15 days
Production Lead Time	30–45 days
Factory Audit	Available
OEM / ODM	Supported

Our OEM/ODM capability goes well beyond colour and logo changes: bring a sketch, a sample or a target spec — capacity, IPX rating, fabric, camo print, zipper configuration, harness and pocket layout — and our China base develops it from the ground up into a finished original product. Ground-up development needs longer lead time than a stock-colour change, so share your launch date and we will schedule sampling.

5. Packaging Specifications

Item	Details
Individual Packaging	PE Bag
Carton Type	5-Layer Export Carton
OEM Carton Printing	Available
Barcode Label	Available
Hang Tag / Care Label	Available (OEM)
Shipping Mark	Available
Pallet Packing	Optional

Recommended Use

Activity	Suitability
Waterfowl / Field Hunting	✔
Fishing / Kayak Fishing	✔
Kayaking / Boating	✔
Hiking / Day Trips	✔
Daily Commuting / Travel	✔
Tactical / EDC	✔
Deep Diving	✘ — IPX7 covers immersion, not sustained depth

Quality Inspection Standards

Inspection Item	Standard
Fabric & Print Inspection	100%
Weld Seam Inspection	100%
Airtight Zipper & Dual-Slider Test	100%
Full Water-Immersion Test (2+ hours)	Batch sampling
Strap, Buckle & Handle Load Test	Random sampling
Camo Pattern / Colour Consistency	100% vs. signed sample
Appearance Inspection	100%
Carton Inspection	100%

Inspection runs IQC on incoming fabric, zippers and hardware, IPQC on welds and zipper installation in process, and OQC before shipment with an AQL check, a batch immersion test and a signed golden-sample comparison. Third-party inspection (SGS / QIMA) is available on request.

Product Highlights

Feature	Advantage
Dual-Slider Airtight Zipper	Two-way, one-handed access with full IPX7 sealing
Welded Construction	No needle holes, so water has no path in
Glove-Friendly D-Ring Pulls	Usable with cold, wet or gloved hands in the field
Four Finishes Incl. Camo	Covers hunting, tactical, outdoor and lifestyle channels
Channelled Padded Back	Cushioned, ventilated carry at a full 25L
Lash Webbing & Compression	Carry tools outside and stabilize a part-full load

Printing & Logo Options

Brand it your way: moulded rubber patch, silk-screen, heat-transfer, welded patch and embroidery, in stock finishes, a custom camo print or custom Pantone colours — accent colours on the pulls, sternum strap and webbing are customizable too.

OEM / ODM and Wholesale

As the factory, we supply the SL-E698 for OEM, ODM and wholesale buyers from an MOQ of 300 pcs, FOB Guangdong, with samples in 7–15 days and production in 30–45 days. We customize colours and camo prints, fabric, capacity, zipper configuration, pocket layout, MOLLE and your logo, and we offer full ground-up custom development. For a custom or wholesale waterproof backpack program under your own brand, send your spec and target quantity and we will quote against it.

Prefer a minimalist urban version? See our 25L minimalist airtight-zipper backpack. Need a rugged camo daypack? See our rugged 15L waterproof daypack.

FAQ

What is a dual-slider airtight zipper?

It is one sealed airtight zip track with two sliders, so you can open from either end or part the sliders in the middle for one-handed access — without giving up the IPX7 seal when it is closed.

How waterproof is it?

It is rated IPX7 with a genuine airtight waterproof zipper on a fully welded body, and every unit is verified with a full water-immersion test of more than two hours. It protects gear through heavy rain, spray and brief immersion.

Which colour suits hunting?

The marsh-grass camo is built for waterfowl and field use, and the grey camo suits tactical and everyday carry. Custom camo patterns are available from MOQ.

What are the MOQ and lead times?

MOQ is 300 pcs, FOB Guangdong, with samples in 7–15 days and production in 30–45 days. Custom colours, camo prints, fabric and logos are available. Send your spec for a quote.

Request a Quote

Sealock (YiFuLong Outdoor Gear Co., Ltd.) has built welded waterproof gear in Guangdong since 2003. To order the SL-E698 or start an OEM/ODM program, send us your colours, capacity, logo and target quantity for pricing and lead time. MOQ 300 pcs · samples 7–15 days · production 30–45 days.

YiFuLong Outdoor Gear Co., Ltd. (Sealock)
Email: info@sealock.com.hk · Tel: +86-13632981825