Endlessly versatile, the Optimus II from Quiksilver will keep those options open throughout the day. Dual functioning convertible backpack and messenger bag with dedicated laptop compartment. Clip on the removable shoulder strap to carry it as a messenger or deploy the stowable over-arm straps and carry it as a backpack. Spacious main compartment with internal organization and a padded laptop sleeve. Three external organization compartments with a stash document sleeve. Padded, removable, and adjustbale shoulder strap. 600D polyester with Q-tec backing. Bottom Width: 18 in Middle Width: 18 in Top Width: 18 in Depth: 5 in Height: 13 in Strap Length: 37 1 2 in Strap Drop: 17 1 2 in Handle Length: 8 in Handle Drop: 2 1 4 in Accessory Strap Length: 48 1 2 in Accessory Strap Drop: 23 1 2 in Weight: 2 lbs 9 oz