Sea to Summit Big River Dry Backpacks

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Big River Dry Backpacks are made from durable, abrasion-resistant 420D nylon ideal for keeping your gear dry on rugged water sport adventures like kayaking, canoeing, rafting or motorcycle touring and can be comfortably carried on your back. A white interior allows you to see the contents easier, lash loops allow for secure stacking or attachment to watercraft, motorcycles and other equipment, a roll-top closure and reinforced, taped seams further keep moisture out and the oval base prevents roll away on a slope. Dry storage for hardcore adventures on land and water


  • Built Tough: Heavy-duty 420D Nylon fabric is super-strong, abrasion and puncture-resistant with a triple-coated oval base for increased water-shedding and durability
  • See Inside: White interior TPU laminate reflects light to provide greater visibility of gear
  • Reliably Dry: Waterproof, non-wicking hypalon roll-top closure secured with Sea to Summit patented Field Repair Buckles for a reliable seal and double-stitched, fully taped waterproof seam
  • Minimalist Carry: Streamlined and adjustable EVA foam pack harness with supportive sternum strap and removable 38mm webbing hipbelt holds pack firmly in place
  • Grab and Lash: Strong and versatile grab-handle and daisy-chain for confident handling and lashing to kayaks, bikes, motorbikes and roof racks
  • Oval base prevents rolling away
  • 20mm (2-Pin) repair buckle size
  • Avoid submersion since water can seep through the roll-top closure of any dry bag


Dimensions 34.5 x 28.5 x 60.4cm (50Litres)
36.5 x 33 x 67.5cm (75 Litres)
Average Weight 760g (50 Litres)
820g (75 Litres)
Made From 420D nylon laminated with TPU film, PFC-free DWR

420D waterproof fabric: a hefty 420 Denier nylon face fabric is bonded to a bright white TPU lining, giving it a hydrostatic head of 10,000mm, as well as exceptional abrasion, tear, and puncture resistance. Rugged and durable.


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