I have dealt with Tinnitus(ringing ears) due to high frequency hearing loss since childhood. As such, I am very sensitive to loud noise. I have employed ear muffs and plugs for over 40 years to deal with noise exposure. This experience has allowed me to be abnormally sensitive to ear muff effectiveness. My last set of muffs advertised 30 db sound reduction so decided to try Decibel Defense due to a higher decibel rating. These muffs utilize a slightly different approach to holding the muffs tightly to the head. I feel strongly that they do indeed provide a higher level of db sound reduction than previous products I have used. I can recommend this product strongly as I believe they perform as advertised, are quite comfortable, easily adjustable and appear to be well made.