The PIP ear plug is made of polyurethane foam, is packaged 200 pair per display box, 10 boxes per case, comes in orange and meets ANSI S3.19-1974 - Attenuation Test Protocol (US) standards. Proper sizing is important when buying this item. The size for this product is Universal. Some products are single use while others are reusable. This particular ear plugs is disposable. Ear plugs can come in many different shapes and colors. This ear plus is cone shaped.