30 liters of storage in ROBIC EXTREEMAa? fabric Lightweight and waterproof Main compartment incl. a removable 30L drysack (race-mood) Thermo Cella? insulation technology integrated in the harness. Prevents freezing of the drink tube. NDMa? 2.1 Harness System, Bounce Free Fit Stretch in the chest straps expands along with the chest during physical exertion, allowing a constant tight and compliant fit The shoulder straps are ergonomically designed for an even and smooth distribution of the backpack over the shoulders The back plate can be adjusted up and down for individual fit and size Waist support belt (removable) with 2x zippered pockets and a backmesh pocket Backpack can be used with or without waist belt Waist belt can be used on its own without the backpack Hydration compatible, up to 3.0L bladder (bladder not included). Insulated bladders sleeve included. Outside compression system Waterproof passport/wallet zippered pocket 2x zippered waterproof side pockets. Helmet carry system (detachable stash carrier) LED-Light Attachment on the back of the pack