Workhorse® NRR 23 Ear Muff Head Band are a multi-position, fully adjustable WorkHorse® earmuffs that can be positioned three ways: overhead, behind the head or under the chin. With an NRR of 23 dB, these ear muffs are made from a rugged construction and non-conductive dielectric plastic. These Ear Muffs are light weight featuring soft foam filled cushions and rugged construction making them extremely comfortable to use. These WorkHorse® earmuffs are a great choice for everyday use.