Mack's AquaBlock pre-molded flanged earplugs are constructed of silicone and designed for super soft, super comfortable, waterproof protection.Unique Flex Stem and triple flange design allow for a more customized fit, which increases sealing ability and improves wearer comfort 1 PairUltra Soft, pre-molded flanged earplugsPre-molded silicone will not deteriorate like similar earplugs made of plasticHelps prevent swimmer's ear and surfer's earWashable and reusable for extended wearCarrying case included