600D polyester. Single 90 litre compartment with 10 litre extension. Top lid with inside PVC zip pocket and outside zip pocket. Side compression straps. Side mesh pockets. Front accessory strings. Fibre glass back frame and padded backing system. Padded and adjustable shoulder straps, lumbar pads and adjustable waistbelt. Size (H)85, (W)23, (D)48cm.