Three varying sizes of luggage packs: Large: 11" X 17" X 5, Med: 12" X 8" X 5", Small: 8" X 6" X 5" * Each pack has a center zipper for easy access and visual of contents * Proofed nylon keeps moisture and dirt out or if using for shoes and damp clothing keeps it in * Designed for maximizing unused space inside a Sportube case, but ideal for us inside any piece of luggage * Keep your workout clothing separate from your dress clothing, store personal electronics such as computer, ipod, video chargers when traveling or organizing and storage in your car, truck or camper