Multi-functional carry bag, with or without casters available, and three storage pockets for easy organization. This is a multi-functional bag with detachable casters. It expands and contracts with a zipper, making it perfect for travel. There's also a place to attach it to a carry-on suitcase. It's very well-made, so you can carry it with confidence. This is a brand new, unused item. - Sizes: 29-40L, 40-80L - Casters: With casters, Without casters - Storage Pockets: 3 types of storage pockets Thank you for looking.