The Back Track was designed to use the space inside your frame. Multiple Velcro attachments give the bag a secure feel and stance, and internal padding help to hold everything in place and hold its shape. A must for everyday rides to hold the basic essentionals. 1000D nylon constructionTough #8 YKK zipper for easy access. Large main compartment Stiff padding in the side panels to help hold its shape Weight: 3.2 oz Dimensions Overall 8″ wide x 7.5″ tall x 2″ thick Capacity 1.3 liters, 80 cu/in.