PITTSBURGH, Pa. - left/RIGHT is the first ear muff designed so that the left muff differs from the right for better fit. These muffs are large enough to fit all ear types and sizes and are available in three noise reduction models: LOW (NRR 21), MEDIUM (NRR 25), and HIGH (NRR 28). Other features include new colors, new comfort headband design, and thin, flexible noise reduction rings. About MSA MSA is the global leader in the development, manufacture and supply of sophisticated products that protect people's health and safety. Visit www.msanet.com to learn more. Contact: CeCe Weber Phone: 724.776.8721 Email: cece.weber@MSAnet.com Website: www.msanorthamerica.com