The Boblbee Megalopolis AERO Backpack (Spirit, Silver Metallic) is designed to carry and protect a laptop computer with a screen up to 15.4. It will also hold personal gear and computer accessories. The backpack is made from high impact grade ABS plastic, with a padded interior. It has a smooth nylon top with a drawstring closure. There are stretchable side loops for a tight closure. It uses a padded heavy-duty nylon top with a ratcheting safety lock strap and buckle closure. The backpack is easy to use even with gloves; especially made for skiers and outdoor enthusiasts. There is a large interior expandable compartment for personal; items. It has exterior zippered slash pocket for documents, a removable cell phone case on the shoulder strap, a dedicated interior pocket for the laptop and an inside organizer accessory pockets. The Megalopolis Aero backpack has great lumbar support, In Europe the backpack has the highest rating level certified for back protection. The backpack is carried by a padded handle, a generation 4 backpack harness with ergonomic shoulder straps, sternum strap and a removable, heavy-duty waist belt with steel carabiners. The harness has air mesh for good ventilation. The lumbar support design spreads the weight from the shoulders to the lower back.