This set of Spacemaker hanging bags by Whitmor features one hanging garment bag and two hanging suit 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 hanging bags can be stored in a basement, attic or garage. Spacemaker bags are perfect for those bulky seasonal coats and jackets that take up too much closet space. Think of the extra space you"ll have by using these three 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 Storage bag using most household vacuum cleaner hoses. Spacemaker hanging 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 or any garment you want to store in an airtight and watertight environment.