Sportsta Mask - Darth Vader's Missing Link?

Whether you're biking, riding, skiing, or climbing, protect your face — and your health — with the Sportsta Mask (£27.99; roughly $40).

Features HEPA-style filtration. Filters Out Exhaust Emissions and sub-micron pollutants all within a lightweight Neotex aerated mask, the Sportsta provides maximum ventilation paired with maximum protection.

I would hope that this would only be required by some commuters and bike messengers, but the way our air is getting, you never know...