Designed to adapt to the 3M™ Airstream™ High Efficiency Headgear-Mounted Powered Air Purifying Respirator (PAPR) System AS-200LBC, AS-400LBC, AS-600LBC and general purpose and welding headgear R-Series. Fits securely to headgear shell to provide excellent hearing protection. NRR of 23dB. ANSI s 3.19-1974. Can also be worn in a swept-back position when hearing protection is not required.
