This lightweight vest-style biking backpack creates a garment-like fit for superior stability and full range of movement over longer distances. The two sternum straps together with ribcage side straps cinch it in precisely, for a snug fit without restricting breathing. The perforated shoulder straps, minimized use of materials, and lightweight deuter Lite back system combine to generate maximum ventilation. Stash your energy bars, tools, and cell phone in the shoulder strap pockets; a wind shell and 2-liter bladder in the main compartment.