adidas Originals Luna Backpack. Meet your new grab-and-go go-to in the adidas Originals Luna Backpack! This convenient bag has multiple storage options for your essentials, a 15" laptop sleeve, and dual side water bottle pockets. Zippered front pockets for additional storage. 17" x 12" x 6.75". Capacity: 23 L. 100% Polyester. Imported.