Can be worn in any of three positions (Over-the-Head, Under-the-Chin, Behind-the-Head). Comfortable, effective, light weight alternative to earmuffs. Easy insertion with no roll down. Highest level of protection available in a semi-insert hearing protector. Lightweight dielectric plastic construction. Non-irritating. Corded/Cordless: Uncorded; Shape: Tapered; Material(s): Polyurethane Foam; Noise Reduction Rate (NRR): 28 dB.