100% Polyester. Fabric: Ripstop. Height: 57.1cm. Length: 37cm. Width: 18cm. Adjustable Chest Strap, Collapsible, Compression Straps, Hydration Bladder Compatible, Padded Hip Belt, Raincover. Durable, Heavy Duty. Fastening: Snap Buckle. Compartments: Zipped Compartment.