Protect your gear while riding in wet nasty conditions. Constructed from a tough sonically welded and seam sealed waterproof material. Mounts and removes quickly with our innovative quickclickreg system. Features included f25 for fast easy on off and swapping between bikes roll closure provides complete weather protection seams are sonically welded and water storm proof all wedge packs feature a light clip for extra safety attachment quickclickreg f25 w seatpost strap material 210 denier 420 denier nylon waterproof fabric sonically welded seams insulation semi rigid eva foam added features safety light clip reflective printing seatpost diameter fits oslash25.4 oslash34.9 mm weight 170 g 5.98 oz medium capacity 1 l 61 ci medium size 18.5 x 11.5 x 11 cm 6.9rdquo x 4.5rdquo x 4.3rdquo medium