Design of neckband allows earmuffs to be worn with a variety of face shields and headgearCompatible with headgear without accessory slotsSoft, adjustable head strap helps to maintain a secure fit with many different types of headgearFit can be confirmed: Verify with 3M™ E-A-Rfit™ Dual-Ear Validation System***X5 products have high attenuation: Perfect for the loudest of jobs