With a 105 dBA noise-level rating, these muffs provide the protection you need for most construction & 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 & 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 / Foam; Noise Reduction Rate (NRR): 29 dB; Style: Behind-The-Head.