The Sea to Summit Evac Dry Bag is a lightweight, liter roll-top, dry bag with an air-permeable base—air can be pushed out, but water can't get in—for dry compression storage while backpacking, sea kayaking, and travelling. The valve-free expelling design works to compress bulky clothing or gear, without the need for straps, by rolling and pushing out excess air. Manufactured from bluesign-approved lightweight PU-coated 70D nylon, and a nylon air permeable/waterproof base, 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, with reinforced stitching at stress points. The secure Hypalon roll-top closure features a D-ring for easy attachment; can be used with Sling Strap (sold separately). The Sea to Summit Evac Dry Bag's 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 six sizes: 3 liter, 5 liter, 8 liter, 13 liter, 20 liter, and 35 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.