Last year, my grandfather became sensitive to sounds due to dementia. I purchased this on Amazon, but he refused to wear it and couldn't use it. It's almost unused, but please understand that it has been stored at home. Thank you for your purchase. ◎ Earmuffs, Soundproof, Adult, Noise Reduction Rating SNR34dB, Hyperacusis, Sound Insulation, Adjustable, Lightweight, Shooting, Work, Safety Earmuffs, Noise Reduction Provides excellent sound insulation performance and reduces surrounding noise in various environments. Please note that complete soundproofing is not possible.