Whether we're biking to the office or going on a daylong adventure Dakine Motive Rolltop 25L will comfortably fit everything what do we need for our walk? Its 100% recycled nylon construction is abrasion and weather resistant which ensures durability, regardless of the weather where we go or go. The main compartment can be accessed via a flip-top closure , and through the side entrance with a zipper and external mounting points can accommodate a helmet or attachable bike lights.