QUALITY MATERIAL: This SPEED multi-function traveling backpack is made of 210D polyester double ripstop PU coating and the liner is made of polyester, which makes the backpack lightweight, waterproof, water repellent and anti-tear.HIGH CAPACITY FOR TRAVEL: 25L high quality professional backpack for cycling, traveling, camping and hiking, designed to be comfortable and functionally versatile.ADJUSTABLE, SILVER REFLECTIVE STRIPE AND NIFCO: Serves to support the pack and distribute the weight of its contents across the body more appropriately, by transferring much of the weight to the hips and legs. Different adjustable sizes to fit your height.DURABLE AND COMFORTABLE: With V.U.S back system, you will feel comfortable when you put on this backpack.WATERPROOF AND WATER REPELLENT: Water-resistant rip-stop polyester as the fabric can quickly slide water aside before water has a chance to penetrate it.