The 3M Peltor X2 Ear Defenders are designed to offer protection against moderate to high noise levels. For example, roadworks or construction. Slim-line cups for moderate to high attenuation that meets the needs of most industrial applications. Lightweight design. Simple colour coding: yellow, indicating moderate to high attenuation. Attenuation: Helmet Attachment: SNR=30dB, H=33dB, M=28dB, L=19dB