"If, however, the product does not cause THC to enter the human body, it is a noncontrolled substance that may lawfully be sold in the United States. Included in the category of lawful hemp products are textiles, such as clothing made using fiber produced from cannabis plant stalks. Also in the lawful category are personal care products that contain oil from sterilized cannabis seeds, such as soaps, lotions, and shampoos."

http://www.justice.gov/dea/pubs/pressrel/pr100901.html