Ziploc Space Bag 3ct Combo Pack (1 Medium Flat, 1 Large Flat, 1 XL Flat) Ideal for storing clothing or bedding. Volume can be reduced by up to 75% to triple your storage space, depending on the items placed in the bag. Filled comforters and jackets will compress more than blankets and sweaters. Airtight, waterproof, & reusable. It protects items from moisture, mildew, insects, odors, and allergens . Vacuum-sealing drastically reduces the effects of oxidation and retards growth of mildew specifically. Pliable plastic is flexible and more versatile than existing rigid bins.