Aero-shaped wedge pack with easy-to-use quick-release or strap mounting system.Key Features:1000 Denier Teflon coated fabric3M Scotchlite reflective stripExpanding design (M L)Built-in pump holder (M L)Tail light strapMedium: 9.6×20.3×12.7cm 0.98-1.31L 135g