Product Details: Noise Reduction These earplugs are effective at reducing noise. They provide safe, non-toxic, non-allergenic waterproof protection while protecting hearing from noise disturbances. They have a Noise Reduction Rating (NRR) of 33 dB, which significantly reduces the effects of noisy environments. Comfortable to Wear These multi-purpose earplugs are versatile and suitable for a variety of activities such as sleeping, snoring, swimming, studying, bathing, traveling, attending loud events or concerts, coping with flight discomfort, and riding motorcycles. They are laboratory tested and proven to help relieve airplane ear pressure and flight-related pain. The rounded design fits naturally around the ear or auricle to ensure a comfortable wearing experience. Soft and Comfortable Made of ultra-soft silicone material, these sleeping earplugs are so comfortable that you will hardly notice they are in your ears. There is no discomfort or pain when wearing them, allowing you to enjoy undisturbed peace. In addition, they are non-toxic and safe to use.