This roll-top backpack is highly waterproof and perfect for cycling. It's lightweight at approximately 1kg with a frame. The unique variable suspension creates space between the back and the backpack, ensuring comfort even when worn for extended periods. Body/Bottom Material: "Body" 210D nylon ripstop, "Bottom" 210D nylon ripstop (UTS-coated silicone) Back Panel Material: 200D polyester, EVA foam, aluminum frame, nylon mesh (Super Tramp Suspension System) Strap Material: Nylon webbing Buckle Material: Acetal resin Zipper Material: Coil nylon Capacity: 30L Weight: 1030g Size: 56 x 30 x 17 cm Color: Eclipse Although unused, this item has been handled by someone else, so please refrain from purchasing if you are sensitive to this.