Whitmor?s spacemaker storage bags will increase your storage space in seconds! you'll get five of the most popular space saver storage bags: 2-jumbo and 3-large storage bags. The reusable space saving storage system works by compressing your items into a waterproof air tight clear nylon bag. Once sealed your items are free from dust mold mildew and insects. These bags can be stored in a basement attic or garage. Spacemaker bags are perfect for those large items that just take up too much closet space such as comforters blankets and other bulky items. Think of the extra space you'll have by using these five bags! three design features work together to create the airtight seal and maintain the vacuum in the bag. The tented one-way air valve allows removal of air from spacemaker bags using any household vacuum cleaner hose. Spacemaker bags are made from bi-axial layers of polyethylene and nylon which air and water cannot permeate. These features give it the strength flexibility and durability to hold the vacuum seal. The zip closure system seals like a sandwich bag but unlike a sandwich bag the closure are airtight. Works with most standard vacuum hoses and creates a watertight and airtight seal for long-term storage. These reusable bags are perfect for seasonal clothing the rarely used special occasion garments bulky pillows or blankets or anything you want to store in an airtight and watertight environment.