The Westwater Backpack is a Monster Waterproof Backpack, offering submersible protection for several days" worth of gear. These Bags Stack Nicely in Rafts, and the Removable, Adjustable and Padded Backpack Straps with Adjustable Sternum Strap and Waist Belt help Haul Gear up the Beach to the Campsite. The Westwater Backpack Protects your Valuables from Splash, Spray, or the Unexpected Rain Storm during a Portage or Overnight Camp. The Westwater Bag is also equipped with a Durable Top Lug Handle making it easy to hoist-up onto someone"s back. Keep your Gear Dry even when submerged! Easy-to-Use Zip Dry Seal presses shut like a freezer bag. It locks shut, keeping out moisture with an airtight, waterproof seal, even when submerged and under pressure. The Zip Dry Seal is Depth Rated to 300" (90 meters). The Backpack is made from Durable 840-Denier Nylon Fabric with a Heavy Matte Polyurethane (PU) Finish for Abrasion Resistance and overall Strength. Clear Version of the Backpack is made from Abrasion Resistant 20-ml Polyurethane. All seams are Radio Frequency (RF) Welded and Guaranteed to be Free of Leaks. The Westwater measures 32" x 24" x 11" (81.3 x 61 x 27.9 cm) has a volume of 4,900 cubic inches (80 liters) and weighs 3 lbs 1 oz (1.39 kg) when empty. Backpack has a 22" (59.9 cm) Top Load Opening, is available in 6 color choices of Black, Blue, Red, Yellow, Clear or Alpha Green and is covered by a limited lifetime warranty.