Ibera Bike Trunk Bag - PakRak Clip-On Quick-Release Bicycle Commuter Bag For weekend outings and commuting to work or school Quick-release bag mounting system, install and release bag within 3 seconds Multi-compartments Reinforced & padded to protect fragile items Padded shoulder strap Ibera's PakRak Quick-release bag mounting systems are only compatible with Ibera Racks (IB-RA1, IB-RA2, IB-RA3, IB-RA4, IB-RA5, IB-RA11, IB-RA15).