The 3M™ Adflo™ High-Efficiency (HE) Particulate Filter is a replacement filter for the 3M™ Adflo™ Powered Air Purifying Respirator (PAPR).The 3M Adflo High Efficiency Particulate Filter is intended for use with the 3M Adflo Powered Air Purifying Respirator. It helps to provide high efficiency respirator filtration when used in conjunction with the respirator. The respirator offers powered respiratory protection for welders and features a lightweight, slim design. The 3M Adflo Powered Air Purifying Respirator is sold separately.