The Leightning earmuffs provide protection from damaging noise levels while delivering to users an unprecedented degree of comfort. The earmuffs use Air Flow Control technology that dictates how sound reaches the ear, producing excellent dB reduction with a slimmer overall profile than competing earmuff designs. Features a steel headband with soft foam padding, snap-in ear cushions, adjustable height and an NRR of 25 dB. L1 muffs have a traditional configuration, L1N muffs use a "behind the head" style headband for easier use with hats or helmets. Not CE certified.