One main compartment Storm-resistant rubber exterior and reflective light-loop Mounts to saddle with one wrap-around cinch strap and one velcro seatpost strap Constructed from upcycled bicycle inner tubes Velcro/Cinch Strap 3x4x5` 60 c.i. Black Small (1-100 c.i.)UPC/EAN/GTIN: 898837002126