Ear protection against high noise levels. The 3M Peltor X Series Ear Muffs X4A 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. 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. Soft wide cushions help reduce pressure around the ears and improve comfort and wearability. Slim-line, dual moulded cups. Large space inside cups helps reduce moisture heat build-up. Electrically insulated wire headband.