Athletic Backpacks designed for functionality for the office, gym, school, hiking, camping or a lone wolf. Express your personality with removable patches in the built in Velcro space. They are made of Waterproof Oxford 900D Polyester and are built to last. Our Backpacks are spacious and provide lots of pockets to hold the gear you need to tackle your day. Check out our Size Chart for your perfect fit. 45L Large Traditional Backpack WOLFpak 19in x 12in Overall Compartment Area Black Trust Your Instincts Patch Included Dont Be Average Be A Wolf Patch Included Dual Cup Holders (Shakers NOT Included) Protective Inside Computer Pouch 10in x 10in Fits Carry On Regulations Overhead Compartment YKK® Japanese Upgraded Two Way Water Resistant Zippers 180 Degree Opening for easy packing Waterproof Surface Oxford 900D Polyester Load Test up to 35lbs