Lewis N Clark Compression Packers let you pack more in less space by compressing bulky items. Ideal for travel, clothing and blanket storage, diapers or dirty, wet clothes. Protects against dirt, insects, moisture and odors. Stow in luggage, gym bag, brief case, luggage, or drawer.Air expels through one-way valve. Lightweight. Wipe clean easily. Reusable. Package of 3 includes one each: Small (14"x20"), Medium (16"x23"), Large (18"x28").