The Sea to Summit Big River Dry Bag is an ultra-durable, trustworth dry storage option, for river trips in a kayak, canoe, or raft, as well as motorcycle touring, bike packing, and other outdoor adventures. Manufactured from lightweight, waterproof TPU-coated 420D nylon, with a 10,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric), its reinforced waterproof seams are double-stitched, and tape sealed. The secure hypalon roll-top closure features D-rings for easy attachment, and hypalon loops make it easy to lash or stack bags. The Sea to Summit Big River Dry Bag痴 low-profile, streamlined shape saves space, and its oval base resists rolling. A patent-pending field repair buckle can be replaced in seconds with a Phillips screwdriver. Available in seven sizes: 3 liter, 5 liter, 8 liter, 13 liter, 20 liter, 35 liter, and 65 liter, to carry everything from small essentials to group gear. Sea to Summit products are guaranteed against defects in materials or workmanship for the lifetime of the product.