The 3M Peltor X3 Ear Defenders are designed to offer protection against high noise levels. For example, forestry or heavy engineering. The 3M Peltor X3 utilises a newly designed spacer to help improve attenuation without the need for a double cup design, thus increasing the space inside the cup for greater comfort and wearability. High attenuation from a single cup design, Light-weight and slim compared with similarly attenuating products. Simple colour coding: red indicating high attenuation. Attenuation: Helmet Attachment: SNR=32dB, H=34dB, M=30dB, L=24dB