Features: How to make the compression happen: There is an extra zipper outside of our compression packing cubes which can be zipped up to flatten the cubes and save the space as far as possible. It just works like a vacuum sealer. You just need to fold your clothes and flatten them, than pack clothes in the cubes and zip the normal zipper, last put a finger on the back of the zipper in the space when compressing the packing cubes in case the zipper get stuck in fabric. Save your time and maximizing your luggage space: Unpacking can be as easy as placing your reusable and durable travel bag into the hotel drawer. Each suitcase organizer compresses the clothes so you are able to pack more clothes in less space. Specifications: Color: multi-color Material: main polyurethane Package includes: 5 x Packing cubes for travel Notes: Manual measurement, please allow slight errors on size. The color may exist slight difference due to different screen display