Mpow Ear Muffs Featuring SNB 36dB noise cancellation and a carrying bag for convenient portability. Purchased for a primary school student's home study, used for a total of about 30 days. Lighter than they appear, and they fit snugly, so the user was happy to use them, but they are no longer needed as they helped improve concentration. There are no visible signs of damage, but they may have slight scratches due to being wiped with alcohol for the listing. Offered only to those who understand that this is a used item. - Brand: Mpow - Model Name: Ear Muffs - Noise Cancellation Performance: SNB 36dB - Accessories: Carrying bag - Headband Size: Adjustable - Ear Cup Material: Steel, Sponge #earmuffs #noise reduction #noise cancelling #concentration #noise #study #selfstudy #homework