This lightweight vest-style biking backpack creates a garment-like fit for superior stability over longer distances without restricting range of movement in any way. The sternum straps together with ribcage side straps allow the volume and fit of this backpack to be cinched in precisely, for a snug fit without restricting breathing. The perforated shoulder straps, minimized use of materials, and the lightweight deuter Lite back system combine to generate maximum ventilation. Stash your energy bars, tools, and cell phone in the multiple shoulder strap pockets, while your wind shell and Streamer II 2-liter bladder (included) can go in the main compartment.