EARMUFFComfortably fits a wide range of head sizes. 17% more adjustable than earlier versions. "Steel wire construction with padded headband and precision micro adjustments designed for just the right fit around the ear New unique memory foam that combines denser and softer foam than previous models, for greater comfort and attenuation. Reduces squeezing pressure on the head and enhances comfort. An oil resistant cup surface to withstand oily, heavy work