The V3 Viking Earmuff offers a multi-position headband which allows the wearer to select how to wear it - over the head, behind the head, or under the chin. It now incorporates the patented Air Flow Control technology. It is a good alternative to cap-mounted earmuffs; it can be worn with hard hats, faceshields, respirators, and other personal protective equipment. The V3 Viking Earmuff has a NRR rating of 29. Sold in a case of 20 earmuffs.