Small/Medium Size: 16 - 20 inches / 41 - 51 cm :: Women > Backpacks. LED bike light attachment pointSingle ice axe loopWomen's backpack specifically designed to provide an optimum fit for the female bodyFront bungee storage systemZippered panel accessStretch pocket to shoulder harnessReflective graphics ensure you are seen in low lightWeight: 0.60kgExternal hydration accessTwo zipped hipbelt pockets for quick access storageBioStretch™ hipbelt and harness for extra support and comfort whilst carryingAirscape™ back panel with foam ridges for ventilation and comfortCapacity: 9 litresLidlock™ bike helmet attachment Size: one size.