Macks kids size silicone earplugs help prevent swimmers' ear by sealing out water and are designed to cover the ear canal and stay in place without the use of unsightly bands or bathing caps. Macks silicone earplugs have been used successfully for over 40 years by patients with ear tubes and for post-op applications. Macks kids size silicone earplugs are waterproof, non-toxic, and moldable to fit any ear shape. Doctors recommend Macks kids size earplugs for sealing out water, reducing noise by 22 decibels, and to help relieve flying discomfort. Macks kids size earplugs are larger and safer than other kids size earplugs to provide a better seal and accommodate all kids ear sizes. Noise reduction rating, 22 decibels (when used as directed) the range of noise reduction ratings for existing hearing protectors is approximately 0 to 30 (High numbers denote greater effectiveness).