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; Style: Over-The-Head.