Don t risk suffering damage to your hearing during noisy environments on the job and elsewhere. These dual-shell cup muffs are suitable for noise levels up to 105 dBA. Wide softly padded headband and soft foam-filled ear cushions provide a comfortable fit. Material(s): Foam; Plastic; Ear Cushion Material: Foam-Filled; Noise Reduction Rate (NRR): 30 dB; For Use With: Extreme Performance Ear Muff CBTHY10.