Lencca Universal Hybrid 3 in 1Design Carrying / Tote / Messenger / Crossbody / Backpack / Shoulder Bag for Apple Macbook Pro series 15.4 / 13.3 inch Mac OS X Laptop (Black) Innovative Design allows to convert easily into 3 different types of bags: backpack, Messenger, and tote bag. Main Interior padded compartment for Laptop up to 15.6 inches & three added interior pockets to sort and store multiple necessaries. Two Front pockets with Zipper closures and Flap for gadgets & Side pockets for water bottles,short umbrella,ipod,cellphone etc. Top dual zipper for easy opening and clear view & Adjustable and removable crossbody shoulder strap. Made from heavy duty durable material. -Exterior Dimension: 17.2" x 16.5" x 2.5"(Tablet Laptop Compartment: 16.9in x 15.2 x 1.75in ).