Mack's® AquaBlock® pre-molded flanged earplugs are constructed of silicone and designed for ultra soft, ultra comfortable, waterproof protection. Unique triple flange design allows for a more customized fit, which increases its sealing ability and improves wearer comfort. Helps prevent swimmer's ear Washable and reusable for extended wear Swim, shower, surf, bathe, water sports, etc. Shatterproof carrying case included.