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  • SL-E071 22L Water-Resistant Commuter Backpack with Padded Laptop Sleeve

    SL-E071 22L Water-Resistant Commuter Backpack with Padded Laptop Sleeve

    SL-E071 22L Water-Resistant Commuter Backpack with Padded Laptop Sleeve. Shell 600D polyester with PU face coating, colour-block panelling; laminated coil zippers with rubberised pulls; light-grey PU-backed lining; padded 15.6″ laptop sleeve with hook-and-loop strap; one zipped and two open internal pockets; twin drawcord side pockets under welded-tab flaps; S-curve padded shoulder straps, padded back panel, top haul handle. 48 × 34 × 13.5 cm, 0.78 kg. Stock colourway yellow / teal; custom Pantone panelling available. MOQ 300 pcs, FOB Guangdong, samples 7–15 days.
  • 20L / 28L Roll Top Waterproof Backpack with Front Waterproof Pocket

    20L / 28L Roll Top Waterproof Backpack with Front Waterproof Pocket

    Sealock supplies the 20L / 28L Roll Top Waterproof Backpack with Front Waterproof Pocket, a welded 500D PVC dry backpack rated IPX7 with a roll-top closure, a waterproof front zip pocket and a full comfort suspension — padded ergonomic straps, an adjustable chest strap and a waist belt over a breathable mesh back. Two sizes. OEM/ODM and wholesale from MOQ 300, FOB Guangdong.
  • Compact Waterproof Fishing Sling Bag with Airtight Zipper (SL-E868A)

    Compact Waterproof Fishing Sling Bag with Airtight Zipper (SL-E868A)

    Sealock supplies the Compact Waterproof Fishing Sling Bag with Airtight Zipper, model SL-E868A, a welded 840D TPU sling pack sealed by an airtight waterproof zipper with a T-grip pull, plus a front waterproof zip pocket, side ladder lash straps, D-rings, a patch panel and an internal mesh zip pocket. 23 × 15.5 × 45 cm. BSCI / ISO9001 / Sedex, MOQ 500, FOB Shenzhen.
  • 45L / 55L / 65L IPX8 Waterproof Caving Backpack with Natural Rubber Seal

    45L / 55L / 65L IPX8 Waterproof Caving Backpack with Natural Rubber Seal

    Sealock supplies the SL-J033 Waterproof Caving Backpack in 45L / 55L / 65L, a seamlessly welded TPU-and-420D-nylon pack rated IPX8 that seals with a natural rubber closure strip, built for caving, canyoning and river tracing with a heavy-duty abrasion base, reflective trim, internal mesh pocket and a full padded harness with hip belt. A designated partner supplier to Exploration China. OEM/ODM from MOQ 300,* FOB Guangdong.
  • Waterproof Bicycle Seat Bag

    Waterproof Bicycle Seat Bag

    Waterproof Bicycle Seat Bag A waterproof bicycle bag, made of 840DTPU/Nylon material, provides excellent waterproof performance, and protects your valuables from water, dirt, and dust, using seamless bonding process technology, The whole bag body is waterproof, and the waterproof zipper is added, which can make you feel more at ease when riding outdoors. The special material is durable, cold-resistant, aging-resistant, sturdy, easy to clean, and easy to adjust the size function.
  • 20L Roll Top Waterproof Backpack with Laptop Sleeve for Commuting and Travel

    20L Roll Top Waterproof Backpack with Laptop Sleeve for Commuting and Travel

    Sealock supplies the 20L Roll Top Waterproof Backpack with Laptop Sleeve for Commuting and Travel, a welded 500D PVC pack rated IPX6 with a roll-top and side-compression buckles. It keeps gear dry through heavy rain, adds a laptop sleeve, a front splash pocket, an internal organizer and side bottle pockets, and carries on breathable mesh straps. OEM/ODM and wholesale from MOQ 300, FOB Guangdong.
  • Related Blog
  • Reviews

  • Dry Bag Manufacturer in China: The Complete 2026 B2B Sourcing Guide

    If you are sourcing waterproof dry bags for an outdoor brand, a retail program, or a private-label line, the manufacturer you choose decides three things at once: whether the product actually stays dry, whether it ships on time, and whether your margin survives tariffs. China remains the deepest supply base for dry bags — but "China" is not a quality grade. Factories range from sticker-and-stitch trading offices to vertically integrated plants with high-frequency welding lines and in-house pressure testing.

  • Waterproof Duffel Bag Manufacturer for Global Wholesale Buyers

    Sealock is a waterproof duffel bag manufacturer supplying OEM and wholesale programmes to outdoor brands, importers, and distributors from factories in China and Vietnam. Duffels look like the simplest product in a waterproof range and are the hardest to scale correctly: when a programme moves from a prototype to a full container, the primary risk stops being material selection and becomes structural stress distribution. This is what separates a duffel built to survive a season from one that generates field returns.

  • What is the difference between a waterproof backpack and a water-resistant backpack?

    Here are the key differences between a waterproof backpack and a water-resistant backpack:

  • Waterproof Fishing Backpacks for Professional Anglers

    Sealock manufactures waterproof fishing backpacks for guide services, professional anglers, and OEM brand programmes from factories in China and Vietnam, with welded and stitched construction in house. Among fishing bag formats, the backpack is defined by a specific tension: it carries the most weight and gives the least access. Every design decision that separates a professional-grade pack from a consumer one is an attempt to resolve that — and most of the work happens in load carriage and reinforcement rather than in waterproofing.

  • ​Introducing the Waterproof Soft Cooler Bag

    The ultimate solution for keeping your beverages and food cold and dry on your outdoor adventures. Whether you're going on a picnic, camping, or heading to the beach, this cooler bag has got you covered.

  • Reorder Consistency: How to Keep Batch Five Matching Batch One

    Sealock produces OEM and wholesale waterproof bag programmes from factories in China and Vietnam, with repeat-order control built around a signed gold sample and a version-controlled production record. Most buyers evaluate a supplier on the first order. The commercially important test arrives later — when the third or fifth container has to look identical to the first, months after the original approval, with different material lots and possibly different people on both sides. This is how drift happens and what prevents it.

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