Packmate Travel/Roll Vacuum Storage Bags are the perfect way to get more into luggage. Without the need to use a vacuum, simply roll out the air using the patented one way valve. The 'Jumper Graph' helps guide purchasers to choose the correct size. Providing on average, 4 times more space, they will also protect the contents from dirt, dust, damp and bugs. Made from a multi-layer laminated blend which includes Nylon to help prevent rips, punctures and tears, they provide years of use and can be fully recycled. Supplied in a pack of 5.