If you're looking for an earplug that is both comfortable and effective, then you need Macks Ear Seals. These earplugs are made from super soft material with 4 flanges, forming a tight seal in your ear and keeping water out. They also have an impressive noise reduction rating of 27dB, making them perfect for use in noisy environments. Whether swimming or just trying to block out some environmental noise, Mack's Ear Seals are a great choice.