Banjo Brothers 05009 medium canvas commuter backpack features the same design and fully-waterproof replaceable liner as our banjo backpacks, but with a classic heavy-duty 20 ounce cotton canvas exterior. The large, open interior is 100 percent waterproof. It will most likely fit more than you should carry, but it was 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. Comfortable and fits riders from 5 foot 2 inches and up. 1500 cubic inches with Dimensions are 11.5 by 8 by 16 inches. Water-repellent dry-wax finish.