【Durable Materials】This backpack is made of waterproof durable nylon,good air permeability.And it is tough, firm and does not fade. 【Color & Size】: Small is 12.2*8.3*5.5in, Large is 14.5*11*6.7in. 2 sizes and 7 colors for your choice, Our backpack must be a must for your travel. 【MUlTI-COMPARTMENT】: 2 main compartments & 1 top zip pocket & 2 side pockets, providing a dedicated space for your tablet, cellphone, pen, keys, wallet, clothes,sunglasses, bottle and more. Easily find what you want.(Large size can accommodate 14" laptop) 【Anti-theft Travel Backpack】：There is a zipper pocket on the back of the bag, which can store valuables such as mobile phones and iPads. In addition, there is a life-saving post buckle device to ensure your safe travelwhich is anti-theft and convenient. 【Multifunctional Daypacks】：The detachable shoulder strap can be used as a shoulder bag and backpack. It can be served as everyday backpack,college bookbags or daily use at anywhere for weekend getaway,hinking,mountaineering, travel, running，etc.