Whistle
It's tiny, cheap, and doesn't require much packaging, and it might even save your life. Experts recommend carrying a noisemaker of some kind, especially if you're working out alone outdoors. This whistle will do the trick - it's more eco-friendly than an expensive plastic electronic noisemaker, but works just as well.Amazon
May 5th 2008 @ 2:59PM
Stay safe during your green workout
