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noise reduction level nrr 33 db, these multi-use earplugs ensure to protect your hearing from loud noise, great for sleeping, snoring, swimming, studying, construction working, shooting, airplane travel, loud events, musician, concert, motorcycles, etc ear plugs for sleeping peacefully through the night, sound blocking out while you sleep, such as noise from a nearby ay or a snoring partner, no more noisy interruptions, silicone ear plugs comes with 2 pairs, small size and large size.