Durable, water resistant 210D nylon body. 500D Tarpaulin reinforced structure. Single side water resistant main zip. EZ find inner lining (easy to find items). Inner zipped pocket for small items. Reflective logo for added safety. Medium: 45 x 5.5 x 13.5cm 3.3L. Large: 51 x 5.5 x 17cm 4.8LItem Specifications: Capacity: 293 Cu In (4.8L), Size: Large, Color: Gray, Model Name: Frame Bag, Dimensions: 51x5.5x17cm, Weight: 215g,