Designed to carry all your biking essentials this jack wolfskin velocity 12 backpack is a sporty little day pack with the acs tight suspension system it hugs the body snugly and is therefore ideal for more energetic activities the central air channel in the middle air permeable back pads and breathable mesh covering fabric ensure superior back ventilation practical bike specific details include attachments for a helmet and led light at the front with an integrated rain cover in the base co