Hair Fertilizer?

I can't remember where exactly i heard about this, a podcast i think (which podcast i have no idea) but it struck me as a very simple thing assuming it works. This product is essentially (treated) hair that is woven into mats and can be used as a combination fertilizer (as it is biodegradable) and something to keep weeds down (like a mat that you can put around say a tree or maybe in between rows to keep weeds down.

http://www.smartgrow.us/welcome.htm

I can easily see some people being repulsed at the idea of using a mat make of someone elses hair but at the same time its nice to see the stuff is being used instead of taking up space in a landfill.