A couple of products, the first is helios socks made from bamboo fiber, wood fiber, milk fiber, recycled plastics, silver, alpaca, carbon, wool, teflon, left over compost, and just about everything else.http://www.helios-sport.com/ Interesting but untried.
The second is the kahtoola microspikes, which I've tried with great success this winter. I cannot find a fault with them so far. http://www.kahtoola.com/microspikes.html
