100% Polyester. Fabric: Micro Mesh, Ripstop. Height: 45.5cm. Width: 27.5cm. Length: 16.5cm. Denier: 600D. Fabric Technology: Brite Lite Torch Technology, Durable, Hardwearing. Design: Contrast, Logo, Text. Fastening: Two Way Zip. Adjustable Sliding Chest Harness, Adjustable Waist Belt, Air Mesh Back, Bike Attachment Straps, Detachable Rain Cover, Grab Handle, Internal Hydration Storage, Shoulder Strap, Tube Retainer, Ventilated. Compartments: 1 Main Compartment. Pockets: 1 Hidden Pocket, Zip, 2 Side Pockets, Bottle. Capacity: 20L. Ref: UTRG9483