Features Enter your model number to make sure this fits. Material: 210D MacroLite (nylon with PU coating), 420D nylon Volume: 730 - 900 cu in Support/Suspension: Airstripes back system Shoulder Straps: contoured with 3D Air mesh Waist Belt: yes, Auto Compress Description Product Description Deuter designed the Compact EXP 12 Hydration Pack with a tight fit for fast pursuits while cycling, trail running, or hiking. Its Airstripes suspension system has adjustable stays that flex to fit your back perfectly, and the Auto-Compress waist belt stays snug on your waist thanks to the Pull-Forward adjustments. The suspension system also includes contoured shoulder straps and back panel made with 3D Air Mesh for ventilated cush. The Compact EXP's hydration system features a separate 3L reservoir bladder compartment, a sealed tube, and a tube line for your hose. There's a stow pocket for the detachable rain cover, and a flap folds out for your helmet. The spacious front pocket has organization slots for tools, tubes, and your smartphone. There are also side pockets for water bottles and waist belt pockets for snacks. Deuter added compression straps for compact security, and the 3M reflective panels keep you visible in low light.