Anko Set of 4 Space Saver Vacuum Storage Bags | Thick Vacuum Storage Bags | Space Saver plastic Vacuum Storage Compression Reusable Ziplock Bags | Free Vacuum Pump, 2 Medium & 2 Large Bag Material Variety: These 2 Large and 2 Medium bags are Made of premium quality and transparent Polyamide Polyethylene to ensure the safety of stored items, the triple-seal formula acts as double security as it restricts entry of air. Testing and Certification: The bags are tested by British company Intertek for colour fastness to rubbing and by a renowned Swiss company SGS for colour fastness to rubbing and water resistance. Durable & Reusable: Our vacuum storage bags are made of thick, flexible and strong transparent Polyamide Polyethylene (PA&PE) material. The stay-on clip speeds up the sealing process with ease. Versatile: Our vacuum compression storage bags work with any vacuum cleaner. Vacuum storage bags are perfect for both household space-saving and travel organizations. Thickened & Stronger: Vacuum storage bags for clothes are made of thickened Polyamide Polyethylene (PA&PE) and are highly resilient, easy to use and will not easily rip.