Features 1. Durable Material: Backpack made of tear-resistant durable nylon fabric and its dual-access zipper with anti-theft design allows for easy access and increased safety. 2. Comfortable Back Support: Ergonomic design of S-shap padded shoulder straps and padding back design, made from high elastic and breathable sponge and fabric, equipment with adjustable chest buckle and ring type adjustable hasp, adjust the strap length freely. 3. Dimension: This backpack fits up to 15.7 inch laptop. Exterior size 45 x 30 x 18 cm. 4. Simple and practical, lightweight and comfortable, very suitable for travel, and it also work well as business/work backpack, computer bag, hiking bag, daily bag, college school backpack. 5. Anti-theft Design: This backpack apply anti-theft design techology. Includes a theft proof combination lock& durable metal zippers, no thief can open your backpack easily. Specification Material: Oxford cloth Color: Black, Grey, Blue Size: 45 x 30 x 18 cm Weight: 900 g Package Include: 1x Laptop Backpack