Conveniently sized for just about any trip; expandable to carry All your gear. Fully adjustable sissy bar mounting system goes on in seconds over any size and style sissy bar pad; once adjusted for your size pad, you never need to adjust it again. Rigid construction holds bag shape even when empty. Top carry handle, backpack straps and shoulder strap for easy toting off bike. Fold-down Duffle bag included for extra capacity; attaches to s22e's top cargo straps, which can also be used to tie down a jacket, rain gear, etc. Five weather-resistant external pockets. Top pocket office organizer and lockable zipper pulls. Constructed of UV-, water- and weather-resistant 12-denier saddle tuff and durable, maintenance-free saddle Hyde panels. Optional roll bags available separately; see page ???. dimensions: 15" w x 18" H x 8" D; expands to 18.5" w; measures 2,2 cubic inches.