Roswheel 14024 Convertible Bike Bicycle Rear Rack Seat Pannier Trunk Bag with Cup Holder Made with abrasion resistant polyester, whole bag is padded with PE cotton for better shape and protection 6 Liters capacity, 1 large main compartment, 3 side pockets and 1 bottle case for better organization of cycling essentials, tools and accessories Fixed securely with 4 Velcro straps, 2 of them are adjustable, suitable for the most mountain,road and commute bikes' racks Portable and versatile usage, as a handbag with built-in carrying handle, as a shoulder bag with the included shoulder strap All around reflective trims and logo increase visibility for the motorists in dark or reduced light for increasing visibility in dark or reduced light