3M™ PELTOR™ Optime™ III Neckband Format Earmuff H540B, Black and Red, Class 5 SLC80 34dB 3M™ PELTOR™ Optime™ III Earmuffs, H540B are our high performance neckband hearing protectors for use in extremely loud environments, reducing noise levels by up to 34 dB. They have a double casing that minimises resonance and comfortable soft, wide cushions to decrease pressure around the ears. Available in headband, helmet attached and Hi-Viz green models. Reduces noise levels up to 34 dB Double casing technology minimises resonance effect 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