Trend Airshield, Fine Woodworking says " distinguished for comfort, clarity of vision and overall user friendliness".

The more we learn about long term exposure to airborne wood dust, the more important powered respirators become. Even with the best dust collection setups, certain operations create unrecoverable dust, which gets into the air and eventually ends up in your lungs. The Trend Airshield helps protect you by providing 4 hours of respiratory protection (to BS EN 146 THP2) with a 4.9 to 6.3 cfm flow of freshly filtered air passing through 2 filters, which you experience as a cool breeze. It's light weight (1.6 lbs) and has room for a second battery to bring run time up to 8 hours with a full charge. The respirator's face shield is rated to withstand low-energy impacts, and replaceable overlays protect it from scratches. The Airshield suspension system changes sizes in place with the twist of a single knob.