MACK'S?AquaBlock's Unique Flex Stem and triple flange design allow for a more customized fit, which increases sealing ability and improves wearer comfort, Pre-molded silicone will not deteriorate like similar earplugs made of plastic, Helps prevent swimmer's ear and surfer's ear, MACK'S?AquaBlock Earplugs are washable and reusable for extended wear, Carrying case included
