The majority of firearm calibers fire at 140 dB or more. For this reason, ear protection is essential when shooting. To bring down the noise to a level that is safe and comfortable, you need hearing protection that has an NRR rating of 22 or greater. The Remington M31 Premium Headband Model Ear Muffs has an NRR of 30. 28 to 31 is recommended for indoor shooting. Shooters should wear an earplug and ear muffs. This is actually a recommendation by the National Institute for Occupational Safety and Health and for good reason. These muffs are for men and women. Used only a handful of times. Great shape. $99 new.