Don this Detectair vest loaded with environmental sensors, and a combination of LEDs and vibrations will warn you when the air gets too foul to breathe. If you start lighting up like a Christmas tree, all you need to do is pull its protective collar in front of your nose and mouth, and it filters out strange dust and airborne creepy crawlies.
Design students Genevieve Mateyko and Pamela Troyer didn't spell out how this garment senses those "toxins" in the air, or exactly what dangerous gases and substances it detects. But something like this could be a lifesaver in a post-apocalyptic world where sarin gas, anthrax and nuclear fallout run rampant. Let's just hope there's never a need for this sort of thing.