Perfect for carrying essentials, the 0.5L capacity ADV top tube bag fastens to the top tube and steering column with adjustable buckle straps. Waterproof zippered top opening for easy access to storage compartment.+ Capacity:0.5L+ Attachment:Adjustable side buckle straps - Fits up to 160mm top tube and 160mm head tube diameter+ Features:Waterproof zipper opening+ Material:PU coated splash resistant 600 denier Nylon+ Size:L180 x W40 x H85 mm