Banjo Brothers 05009 Canvas Commuter Backpack, Medium Classic heavy-duty 20 ounce cotton canvas exterior with a large, open interior that is 100 percent waterproof Designed for bike commuters, so a change of clothes, lunch, shoes and laptop will fit just fine Pockets under the flap; one large zippered pocket, a medium sized flapped pouch and pencil pockets complete the bag 1500 cubic inches with dimensions are 11.5 by 8 by 16 inches Water-repellent dry-wax finish