Fabric XTP600D Ripstop PU Coated Polyester, Airmesh Padded Back and Harness, Optional Twin Compartment Conversion, Bottom Compartment Easy Access Zipped Opening, Ice Axe Loop, Accessory Straps, Lid Compartment, 2 Side Pockets, 40mm Adjustable Quick Release Side Padded Waist Belt, 25mm Adjustable Quick Release Chest Strap, Capacity 45L