Osprey radial 34 backpacklight and fast bike commuters who need extra space for gear will appreciate the cycling specific design and features of the radial 34 from a harness and suspension system that moves with the rider and provides incredible ventilation and comfort with heavy loads to integrated helmet and u lock carry this is the premium commuting pack lidlock helmet attachment keeps your hands free to dig for change at the coffee shop and the integrated kickstand keeps your pack upright