3M™ PELTOR™ Optime™ I Helmet Attach Earmuff H510P3GS/E, Yellow, Class 5 SLC80 26dB 3M™ PELTOR™ Optime™ I Earmuffs, H510P3GS/E are our innovative, lightweight helmet mounted hearing protectors that reduce noise levels up to 26 dB. They feature a low-profile design that makes them easy to combine with other safety equipment and have soft, wide comfortable cushions that reduce pressure around the ears. Compatible with 3M 25 mm hardhats and visors. Also includes 30 mm hard hat adapter. Reduces noise levels up to 26 dB Large space inside the cups helps minimise heat and moisture build-up Soft, wide, cushions help reduce pressure around the ears Cushions and inserts available as replacement Hygiene Kits