The Howard Leight Leightning L1 Shooting Earmuff features patented Air Flow Control technology which protects against both high and low frequencies. This makes for excellent hearing protection on the range and in factory/industrial environments, but it also for home use in blocking out loud power tools while working in the garage, or mowers and trimmers while doing yard work. The L1 Earmuffs can also function as a useful work or study aid, blocking out extraneous noise and allowing you to concentrate.ultra-lightweight by design, these Honeywell Earmuffs utilize an adjustable headband that features a steel wire core for added durability.