Carry all your small parts on your XLAB Wing Bag can carry 2 CO2 cylinders, CO2 pump, pair of tire levers, patch kit, and mini tool kit. Could alternatively hold your phone, cash, keys, etc. Fits down inside Carbon and Super Wings Attaches with X-Straps to rear of Carbon Sonic, Sonic, Turbo, and Mini Wings Extended front Strap can fit around Aero seat posts.