The Global Glove Bullhead Safety ear plug is made of polyurethane foam, is packaged 100 pair per box, 10 boxes per case, comes in orange and meets ANSI S3.19-1974, EN 352-2: 2002 standards. 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 bullet shaped.