The natural base is composed of wood, hemp, bamboo, rice husks, or other natural fibers, all of which are non edible. All three grades of Polysole are 100 percent biodegradable “after disposal”. When we say biodegradable we are talking only weeks not months or years. Other bioplastics can still hang around in landfills for decades after disposal. http://green.blorge.com/2010/09/solegear-bioplastics-offer-bio-solutions-for-hig… added by: JackHerer
