Leightning Neckband EarmuffsPatented Air Flow Control™ technology, delivering optimal attenuation across all frequencies without increasing earcup size or weight. Slimline beckband design. Snap-in ear cushions make replacement quick and easy. Telescopic height adjustment remains fixed during use. Ultraslim, lightweight earcups can be worn with welding shields, hard hats and other PPE. Color: Black; Noise Reduction Rate (NRR): 22 dB; Type: Over and Behind Head.