ZUOLUNDUO Canvas Backpack School Bag Casual Outdoor Travel Bag Daypack M8517SJ,Coffee Main material: high density canvas and durable metal buckle Approx Dimensions: 11" L x 3.1" W x 9.8" H Eco-friendly casual life style. Canvas backpack; Durable and fashionable There is a function of zipper in the shoulder strape,so that it can turn backpack to shoulder bag according to your habit. Whether you're running errands around town or heading to the school, this vintage backpack will make the perfect companion!