The Chase Harper 501 Sport Tankbag is our 1000 cubic inch tankbag featuring our exclusive MultiMount attachment system (a hybrid magnet/strap arrangement), the MOST secure mount system available anywhere. It features rugged 1000 denier DuPont Cordura™ nylon and offers an optional a fitted raincover (which fits nicely in a pocket on the lid). It features a carrying strap, and additionally, there are triangular loops on top for mounting an optional shoulder strap. Besides the main compartment there are two side and one front zippered pockets and a top mounted reversible (and replaceable!) clear map pouch. In all, this is a tankbag with very good value and state of the art mounting- a hard combination to better. And remember, Chase Harper products all carry our famous Unconditional Lifetime Warranty.