3M Peltor Optime 98 Over-the-Head- Earmuffs, Hearing Conservation, is recommended for environments with noise levels up to 98 dBA. A stainless steel headband provides consistent force to keep the earcups snugly in place yet with a comfortably low-pressure. Earcup pivot points tilt for a fit that is customized to each person who wears the earmufts. Wide, liquid/foam filled earmuff cushions fit gently to form a comfortable, noise-blocking seal. Bright yellow earcups provide color-coding for hearing protection compliance sightings. These comfort features may encourage a higher rate of hearing protection compliance among workers where hearing protection is required. These earmuffs are commonly used in the following environments: factories, sheet metal works, schools, printing and textile operations, and power equipment. Noise Reduction Rating (NRR) 26 decibels. ANSI S3.19-1974/CSA Z94.2.Do you order this product often and/or in large quantities? Check out our Large Order Program to save yourself time and money.