The Sea to Summit eVac Heavy Duty Compression Dry Bag is an ultra-durable, 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 the most rugged outdoor conditions when 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 TPU-laminated 420D ripstop nylon, with a valve-free expelling 500D Cordura 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 Heavy Duty Compression 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 four sizes: 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.