Ultra soft, ultra comfortable, waterproof protection. Mack's unique triple flange design allows for a more customized fit, increasing sealing ability and improving comfort. Doctor recommended Mack's AquaBlock Earplugs help prevent swimmer's ear and surfer's ear. Carrying case included. (2 Pair). Unique Flex Stem and tiple flange design allow for a more customized fit. Pre-molded silicone will not deteriorate like similar earplugs made of plastic. Helps prevent swimmer's ear and surfer's ear. Washable and reusable for extended wear. Carrying case included