100% Polyester. Lining: Polyester. Height: 47cm. Length: 32cm. Width: 18cm. Capacity: 30L. Compartments: 1 Main Compartment, 2 Bottle Holders. 15 Laptop Sleeve, Key Clip, Organiser Section, Padded Compartment, Padded Mesh Back, Padded Straps, Shoulder Strap, Sternum strap. Fastening: Zip. Ref: UTMW1559