Ergonomic hearing protection for the modern workplace. The K2M earmuffs deliver a noise reduction rating of 24 decibels and are designed to be used alongside the mechanical face shield on your XP Ceros® safety helmet. Lightweight materials combined with compact, snug-fitting memory foam ear cushions deliver outstanding comfort and a pressure-free fit - keeping your hearing protection on your ears and your hearing intact. When not needed, earmuffs are able to twist and nest evenly across the top sides of the helmet, so you experience less strain and more balance.