Large duffel bag/backpack expands from 45L to 65L for heavy travel or work use. Rip-proof and weatherproof 100% recycled 600D nylon canvas shell provides protection and durability. Comfortably carry the heaviest loads with comfortable, padded, stowable shoulder and waist straps. 2 internal and 2 external pockets for extra storage. 6 padded external handles for easy grab and go. All Peak Design products have a lifetime warranty.