High performance hearing protector for protection against high noise levels, whilst maintaining a sleek, low profile, aesthetically pleasing design Innovative sealing ring provide excellent acoustic protection particularly against sounds dominated by low frequencies Slim and lightweight compared to other high attenuating earmuffs Electrically insulated wire headband Twin headband design helps reduce heat buildup with good fit and balance Lightweight design (234g) 3M PELTOR Earmuffs X4 is a high performance hearing protector for use against high noise levels in a wide range of industries, offering 33 dB attenuation with a sleek, low profile aesthetically pleasing design.