Sleep better naturally! Latex free. Protects hearing by reducing harmful noise. Flents-quality products sine 1927. Excellent for Sleeping Power tools Lawn mowing Car racing Concerts Rifle range Studying. NRR Noise reduction rating 29 decibels when used as directed The attenuation values were obtained under laboratory conditions and are for comparison purposes only. The amount of protection afforded may differ depending on how the protectors are fitted and worn. The attenuation values in actual use may be lower. The range of noise reduction ratings for existing Hearing protectors is approximately 0 to 30 higher numbers denote greater effectiveness .