The Sea to Summit Evac Compression Dry Bag is a lightweight, roll-top/compression strap dry bag with an air-permeable base-air can be pushed out, but water can't get in-and four straps for even compression. Ideal for backpacking, sea kayaking, and travelling, the valve-free expelling design works along with the straps to compress bulky clothing or gear, by rolling and pushing out excess air and cinching down the straps. Manufactured from bluesign-approved lightweight PU-coated 70D nylon, and a 40D 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. A waterproof Hypalon roll-top closure, and four straps featuring two ladderlock and two side-release buckles, keeps gear compact and secure. The Sea to Summit eVac Compression Dry Bag's low-profile, streamlined shape saves space, and its oval base re 5-liter compression dry bag measures 6.5 x 5.8 x 12.3 inches when closed, and weighs 0.22 pounds; volume is 5 liters (with closure rolled three times) Waterproof and air-permeable eVent fabric base allows air to be pushed out but water can't get in Waterproof, roll-top closure secured with our patented Field Repair Buckle for a reliable seal Lightweight, bluesign APPROVED recycled 70D Nylon main body fabric uses a PFC-free DWR finish Robust, waterproof PU-coated 70D recycled Nylon body fabric has a 10,000mm hydrostatic head Waterproof seams you can trustdouble-stitched and tape-sealed Eliminate bulging and achieve even compression using the four straps with two ladderlock and two easy-access side-release buckles Sturdy, Nylon webbing handle on oval base provides a secure grab point Light-reflecting white interior coating makes seeing and finding gear easier