With a 31-liter volume, the Surge backpack has more than enough room to accommodate your daily office carry. It also has a sleek, tech-inspired design and a coveted endorsement from the American Chiropractic Association. The FlexVent suspension system, certified by the American Chiropractic Association, features a flexible yoke built from custom injection-molded and shoulder straps, a padded mesh back and a lumbar panel for ventilated support. This pack features a large main compartment for books and binders, a protective padded laptop sleeve, and a stand-up design to keep items securely inside. Also includes an external secure-zip pocket and two stretch mesh side pockets. For everyday, commuting or travel, this backpack has a top handle for easy grabbing and a removable waist belt for a custom fit. A sternum strap with whistle buckle adds extra support and safety. Reflective details help you stand out. Dimensions: 20″ x 13.25″ x 10.5 (50.8cm x 33.7cm x 26.7cm). Laptop Sleeve: 10.25″ x 14″ (26cm x 35.6cm). Fabric: nylon with a durable water-repellent finish. Boot: 1680D ballistic nylon.