Historically, higher attenuating ear muffs meant large and bulky cups - but not anymore. The 3M Peltor X4 Ear Defenders can attenuate sound by as much as 33dB whilst maintaining a sleek, low profile, aesthetically pleasing design. €¢ Extremely slim and light-weight cups help to improve compatibility when used with other Personal Protective Equipment. €¢ New specially formulated damping pads and innovative foam contained in the sealing ring provide excellent acoustic protection, particularly against sounds dominated by low frequencies. €¢ Simple colour coding: bright green, indicating high attenuation combined with an extremely slim, lightweight design