NRR(Noise Reduction Rating) 21dB: the noise reduction of the earmuffs is very safe. It can not only protect your ears, but also can ensure that you can be safe in the case of danger, because you can always hear the voice of the outside world, it just let the noisy voice at the level of no damage to the ear.
ANSI S3.19 & CE EN521 CERTIFIED:Lab tested and certified to US and European standards. NOTE: This ear muffs is passive noise isolating and no batteries needed
Adjustable Headhand :one size fits all heads.You can buy one,then all of your family members can use the ear defenders to protect their hearing.
Comfortable Material:the headband is made of leather,it is easy to clear,and both of the ear cushion are made of SOFT sponge
TOENNESEN SERVICE:If you have any question about the noise reduction ear muffs,please contact us,we will respond you within 12 hours