· TPU laminated heavy duty waterproof 600D Nylon · UV resistant and PVC free, Pliable and Resilient Fabric can withstand low temperature | · Professional outdoor grade shoulder straps and padded kidney belt provide great support and comfort when the backpack is fully filled. · Airtight heavy duty double locking top seal · Air release valve makes folding easy · Welded construction for permanently sealed seams | · Illustrated hangtag shows how to open and close the top seal lock · Rectangular bottom measures 14" x 8.5", the bag from bottom to the seal lock measures 29.5". By volume it's 55 Liters. | · Backpack can be secured to a motorcycle or a kayak with provided adjustable strap and anchor loops. ?. PhantomDry Backpack carries a 10-year USA warranty. |