Lining: polyester, closed: zipper, Capacity：11~20L, Strap Length：45~79cm, in the package, anti-scratch, anti-water, anti-wrinkle, comfortable, ultra-light, weighing 30KG no pressure, S-type shoulder strap, for riding, walking, travel, fishing, mountaineering, camping and so on, reflective panel design in the night riding no longer afraid of the night light on a reflection.