Get maximum protection with contemporary design. Leightning® has the highest attenuation of any ear muff. The robust steel headband will stand up to the most demanding use. The padded foam headband and super soft ear cushions deliver long-wearing comfort. Telescoping height adjustment will fit a wide variety of wearers. The L1 has a NRR of 23dB. The L2 has a NRR of 26dB. The L3 has a NRR of 31dB. Sold individually.