3M Peltor X-Series Over-the-Head Earmuffs, NRR 22 dB, One Size Fits Most, Black/Green X1A (Pack of 1) N/A Imported Over-the-head hearing protection with Noise Reduction Rating (NRR) of 22 dB for low to moderate noise exposures Twin headband design helps reduce heat buildup with good fit and balance Wire headband offers comfortable pressure during prolonged usage Earcups tilt to ensure a customized fit and comfort for individual users Electrically insulated (dielectric) wire headband helps reduce exposure to electrical hazards