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.
A great defense against this nuisance dust is Trend's Airshield Pro personal dust filtration respirator. Its dual filters provide a 98% efficiency factor and a flow 5.6 cfm to 7 cfm of freshly-filtered air. A comfortable face seal cradles the sides of your face and beneath your chin to seal out dust. The on board battery and motor sit further back on your head than in the original Airshield model, providing for greater balance and comfort as you work all day on a the 8 hour run-time battery. A clear plastic face shield provides low impact protection (ANSI Z87.1 rated) and replaceable visor overlays keep the view clear. Accepts optional clip-on hearing protectors. Headband adjusts from 20-1/2" to 24-1/2". Low battery audible alarm.
Includes battery charger, 1 NI-MH battery, 1 visor overlay and carrying bag. Weight 2.2 lbs