Usage and features :-The vacuum storage bag sets save 75% space and bring more storage space for your suitcase, wardrobes, closets, garages, basements, lofts and suitcases. -Airtight bags do not leak. The vacuum storage bags are with Double-Zip Seal and the Triple-Seal Turbo Valve to get out of the air and the air back in. -Anti-microbial materials. Vacuum storage bags are 35% thicker than plastic material, it is anti-microbial materials to prevent mold, mildew and bacteria from attacking duvets, clothes. -Free Travel Hand Pump Please feel free to contact us if there is any question pre or after sales. This compression bag can be reused