The most comfortable, highest attenuating ear muff available! Bilsom's new LEIGHTNING L3 earmuff blows away the competition with an NRR 30— the highest available in the industry. Tough, stress-resistant steel frame is built to last. Padded foam headband and soft, slow-recovery ear cushions provide a more form-fitting seal and long-wearing comfort. Telescoping height adjustment allows you to get the proper fit every time. Pivoting head cups for easy on/off. Vinyl covering ear cushions are soil resistant. Lightweight, 10 oz., Jet Black.
Compliance: ANSI S12.6-1984.

Pull the cups outward and position so that the cushions fully enclose the ears and seal tightly against the head.
Adjust the height of each cup equally on both sides while holding headband on crown of head creating a snug and comfortable fit.
Proper Fit: With ear muffs over both ears while in a noisy environment, place the palms of your hands on both cups and push cushions towards head. If there is a perceptible difference in the noise level, ear muffs are probably not fitted properly.
If proper fit is not obtained, repeat fitting instructions.