Ergonomic hearing protection for the modern workplace. The K2M magnet earmuffs deliver a noise reduction rating of 25 decibels and can be used alongside the magnetic face shield on your 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.