3M Peltor Optime I H510F Ear muffs offers versatile protection and is very lightweight providing high wearer comfort. It combines a low profile with generous inner depth which makes it easy to combine with other equipment and allows the ear to rest comfortably. Ideal choice for both short and long duration tasks. Wide comfortable sealing rings are filled with a unique combination of fluid and foam, which gives optimum sealing and low contact pressure at the same time. Ideal for use in environments with moderate industrial noise, such as workshops, sheet-metal shops and printing works, but also suitable for outdoor tasks such as lawn mowing or in connection with hobby and leisure activities. SNR = 28dB, High Frequency = 32dB, Medium Frequency = 25dB, Low Frequency = 16dB.