Material: 100% waterproof and wipeable, 500D PVC roll top closure with 1000D PVC underside for durability with removable semi rigid EVA base. Reflective highlights for increased visibility. Multiple Attachment Points: Hypalon, MOLLE, D-ring and Daisy chain linking compatible to give many options to attach additional luggage or accessories. Easy to pack: Large, easy access main opening with air release valve so air is expelled and the contents compressed as you roll. Portable: Grab handles on front, back and sides. Detachable back-pack padded shoulder straps enable easy handling on and off the bike. Secure: Strong Duraflex buckles, under seat security strap and 4-point adjustable roll top closure.