Mack's Aqua Block pre-molded flanged earplugs are constructed of silicone and designed for super soft, waterproof protection. (2 pair) 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 Washable and reusable for extended wear - carrying case included .
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