3M™ PELTOR™ Optime™ I Neckband Format Earmuff H510B, Yellow, Class 4 SLC80 25dB 3M™ PELTOR™ Optime™ I Earmuffs, H510B are our innovative, lightweight hearing protectors that reduce noise levels up to 25 dB. They feature a low-profile design and neckband design, which makes them easy to combine with other safety equipment and have soft, wide comfortable cushions that reduce pressure around the ears. Reduces noise levels up to 25 dB Low-profile design combines easily with other safety equipment 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