The backpack is made from a mix of polyester and ProTarp that provides excellent durability combined with water and dirt repellency. It also has a reinforced back for better carrying comfort and stability. The backpack has a main compartment with zipper closure, several internal mesh pockets and a padded laptop compartment. At the front is a fully waterproof zippered pocket. The bag's material is moisture-wicking, which wicks moisture away from the inside to keep it dry and fresh. It also has two mesh pockets on the sides for water bottles. The bag can be carried in the hand with the top strap or with the adjustable backpack straps. FEATURES - Durable material - Dirt and water repellent - Reinforced back - Adjustable straps - Large main compartment with organizational pockets - Padded laptop compartment - Waterproof zippered outer pocket - Mesh pockets for water bottles SPECIFICATION - Material: Polyester, ProTarp - Dimensions: 55.9 x 35.6 x 30.5 cm Black/ONESIZE