E·A·R Peltor OPTIME 105 Behind-The-Head EarmuffsWith a 105 dBA noise-level rating, these muffs provide the protection you need for most construction and manufacturing environments. Double-shell Twin-Cup™ technology ensures ultra-effective broad-frequency attenuation. Low-profile, behind-the-head design enables use with most protective eyewear and nearly any helmet or hardhat. Liquid-filled foam ear cushions more easily conform to the contour of your head, ensuring a low-pressure, comfortable fit. Color-coding simplifies workplace compliance sighting. Material(s): ABS Plastic; Ear Cushion Material: Liquid-Filled Foam; Noise Reduction Rate (NRR): 29 dB.