Material: Made from Oxford cloth that is waterproof, wear resistant, and easy to clean. Capacity: Large 36 to 55 liters, spacious enough for travel or daily use. Laptop Compatibility: Comes with a padded sleeve that fits laptops up to 15.6 inches. Shoulder Straps: Three layer design for extra comfort and better support. Security Features: Includes an anti theft code lock and hidden pockets for safe storage. USB Port: Built in external USB charging port for easy device charging on the go. Structure: 3D backpack design with organized compartments for neat storage. Size: Around 47 by 30 by 16 centimeters. Ideal For: Travel, daily commuting, work, or gym use for anyone who needs a secure and roomy backpack.