The Wedge Pack II saddlebag is made of durable 1000 Denier Nylon fabric to provide superior water resistance. The extra-long 3M™ reflective strip around the perimeter of the bag offers greater safety at night. The bag can be quickly clipped on/off thanks to the innovative QuickClick® system. The bag includes a raincoat. quickClick™ (F25) w/ seatpost strap Capacity: 1.25 - 1.65 L Expandable: yes Material: 1000 denier nylon Seat post diameter: ø25.4 - ø34.9 mm Dimensions: 18.5 x 13 x 11.5 cm Weight: 183 g