Certified organic wool must comply with organic standards for livestock (such as organic beef). These standards include providing organic feed for the sheep, not overcrowding the sheep on the land, and the prohibition of synthetic chemicals and hormones. Because of increased production costs, organic wool does cost more than conventional wool. Organic wool feels, looks, and can be used exactly like conventional wool. Some conventional wool garments are labeled machine washable, but because organic wool is usually not treated with any shrink-reducing chemicals, it should be drycleaned. GreenEarth, in addition to being an environmentally-friendly choice, prevents shrinkage.