Topeak Aero Wedge Bag Medium w/Straps TC2261BTopeak Aero Wedge Bag w/Straps has an Aerodynamic style with traditional strap mount too easily connect to a seat. 1200 Denier Polyester is a higher quality material than most other bags use. Bag expands to accommodate larger items. Reflective piping for night time safety.768661114497