The Powered Air-Filtering Helmet provides a lightweight, totally portable system through which contaminants are filtered away and replaced with a continuous stream of clean air. A small motor and fan mounted in back of the helmet pulls in air from the outside and filters it through a replaceable pre-filter and main filter. Low-voltage power comes from a rechargeable battery pack or vehicle adapter. All such systems, which come with filters installed and replacements available, allow normal conversation and accommodate glasses/goggles and beards/mustaches.