Amazon.com: mygreen Sling Bags Chest Shoulder Backpacks 。Sling bag convertible to backpack! Canvas Chest Bag Large Capacity Leisure Bag Single Shoulder Messenger Bag Multi Functional Back Backpack Multi Functional Backpack. creating a simple and elegant aesthetic bag Convenient storage, Many zippered pockets Exterior: 1 snap pocket, 3 Zip pockets, 1 Zip main compartment Interior: striped lining, 1 Zip pocket, 1 open pocket, 1 credit card/id pocket, 3 pen/pencil pockets Zipper design makes it easy to switch from backpack to sling bag Adjustable shoulder strap Outer Canvas: 100% Cotton/ Lining: 100% Polyester Heavier canvas making it a great travel bag or everyday use. Size: 12\" x 4.5\" x 16\" Preowned, Gently Used, Very Good Condition