Excellent noise-blocking performance and superior comfort-wear features keep the Leightning® line hot and bright. Bilsom® Air Flow Control™ technology ensures optimal hearing protection across all frequencies. Handy attenuation control allows you to match the muff's noise-reduction rate to your unique environment. Telescoping, thickly padded steel-wire headband facilitates fixed-fast adjustments and slop-free wear, while eliminating common "head-squeeze" issues. Super-soft, ear-pampering can cushions feature a snap-in design, enabling quick and easy replacement when required. Material(s): Metal; Ear Cushion Material: Foam; Noise Reduction Rate (NRR): 30 dB.