Polyester lining Zipper closure SPACIOUS & MULTI COMPARTMENTS: Muzzle laptop backpack (16.5 x 12 x 6.7 inch) is designed for maximum storage efficiency, 1 main zipped compartment, 1 laptop padded pocket, 1 front zippered pocket, 2 water bottle side pockets, 1 internal zipper pocket, 2 inner pen pocket, 2 inner mesh pocket. EASY TO ORGANIZE: This simple classic backpack holds all of your essentials and more, not only provides you with plenty of space to pack all of your laptop, chromebook, binders, as well as pack your book, cloth, chargers, water bottles, pens, highlighters, or other small stuffs you daily needs. LIGHTWEIGHT & DURABLE: This lightweight backpack weights 0.45 kg only, is great for daily use, day-trips, traveling, hiking, school, camping. Premium reinforced metal dual zippers, secure zipper closure and metal buckle ensure smooth open. Reinforced cross stitches are adopted to fix the strap firmly; Each strap is sewn on securely and padded for rip-resistant and maximum durability. WATER RESISTANT & PORTABLE: This school backpack is made of durable water resistant polyester will keep a laptop dry in the rain. The shoulder straps are specially designed wider than usual to ease the stress on your shoulder and comes with a adjustable shoulder buckle. WASHABLE & GUARANTEE: This school bookbag is machine washable, however, in order to prolong the life of the school bag, recommended hand wash. Our factories follow a strict set of specifications and quality standards, however, if a problem develops, we will provide you with the best solution!