The ultimate in earplug comfort, Mack’s® silicone putty molds to the unique contours of any ear Provides a better, more comfortable fit and seal than custom ear plugs Safe for use with ear tubes Provides protection after surgeries Helps relieve ear pain as the result of airplane air pressure Protects hearing from loud noises Provides non-toxic, non-allergenic waterproof protection Great for sleeping, swimming, studying, bathing, travel, loud events, flying discomfort, etc. Made in the USA Noise Reduction Rating (NRR) – 22 decibels