Designed to employ the unused space in your frame, MidLoader carries the heaviest items for your bike adventure. Constructed of lightweight, highly water resistant and durable materials, it mounts and removes quickly with velcro fasteners. Two water-resistant zippered openings provide easy access to all your gear from either side.Key Features:Lightweight, polyethylene/nylon construction,Water resistant zips,Velcro mounting straps,3L capacity / 37.5x12x6cm / 150g,4.5L capacity / 46x12x6cm / 200g,6L capacity / 54.5x13.5x6cm / 337g.