Material: 800D waterproof encrypted oxford cloth [Size]: Height 51x width 36x thickness 16 cm (20x14x6.3 inches) [Capacity]: Approx. 35L [Weight]: Approx. 1000g * Product color is subject to the main picture, secondary picture is for reference only * Size is manually measured, there may be slight error, please refer to the actual product Large outdoor tactical backpack has multiple pocket sand compartments to store your essentials. The capacity is about 35L, which is quite enough. (The color of the product is subject to the main picture, the sub-picture is for display details only) High quality fabric: The bicycle backpack is made of 800D high-density Oxford fabric with PU coated lining, which is waterproof, wear-resistant, tear-resistant, and durable. Outdoor bike backpack gear bag, perfect for various outdoor port scenarios such as wild adventure, mountaineering, fishing, running, cycling and traveling. Outdoor duffel bag with adjustable quick-release buckle, adjustable shoulder straps and waist belt to suit all body types. The travel backpack has a wide shoulder strap and built-in foam design that conforms to the curves of the human body, is comfortable and suitable for long-term wear. It is also possible to expand the carrying capacity of the backpack.