Tigernu Water Resistant Unisex Silm Anti theft USB Charging 15.6 inch Laptop Backpacks Travel Bag School Bag (Black Grey) PREMIUM MATERIAL: This stylish backpack is made of abrasive resistant, water resistant Oxford fabric. For the inner lining, soft feel polyester is used. The metal fittings, dual-layers four-teeth reinforced anti-theft zippers are scratch resistant, tearproof and of .