Howard Leight Leightning L3 earmuff is a lightweight design muff with a padded foam headband that makes it comfortable to wear for any duration of time. The soft ear cushions are replaceable, using the Howard Leight Hygiene Kit, part #1012000. The L3 offers a high level of protection with an NRR of 30. Ideal for use in any area with loud noises for prolonged periods of time, the shooting range, race track, lawn maintenance with loud equipment and industrial facilities.