3M™ PELTOR™ Optime II Helmet Mountable Ear DefenderReduces noise levels up to 31 dB Sealing rings filled with a unique combination of liquid and foam 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 Available in headband, neckband, helmet attached and Hi Viz green models Use in loud, demanding environments with substantial industrial noise such as airports,