Buckle flap-over with two easy thumb release clasps opens to one main compartment with a divider for files and folders, small zip-pocket, and an extensive zip-down organizer, plus three flap-over velcro pockets and large vertical pocket. Back flap-over opening reveals large padded compartment for a laptop (16" x 12.5" x 3"). Detachable side phone pocket, top handle, and adjustable/detachable shoulder strap