These super comfy bamboo Ribbed Boot Socks will keep your feet warm and your environmentally conscious mind at ease. They are part of a sock line called Greenology that makes all their products from 100% organic cotton and Bamboo. Check out all of the Greenology footwear in our Crazy Socks section. These boot socks come in Black, Brown, Quicksand and Ash/Navy. They come in one size to fit most women shoe sizes 4-10.