Flexibility for wearing earmuffs in multiple positions (over-the-head, behind-the-head or under-the-chin). Can be worn with hard hats, face shields, respirators and other PPE. Robust, non-deforming dielectric construction. Features patented Air Flow Control technology for optimal attenuation and snap-in ear cushions. Includes elastic headband strap for better positioning. Tested to ANSI S3.19-1974. CSA Z94.2 cerjpgied. Please call for special pricing.