TeeHee Viscose from Bamboo Diabetic Crew Socks 3 Pair Pack. Quality Guarantee: Contact us for any problems you might encounter and we will do all we can to help!. Signature Viscose from Bamboo Yarn – Non-binding top, soft, smooth, and stays up and on. Sizing Guidelines: Sock Size 9-11/Shoe size 6-9, Sock Size 10-13/Shoe size 7-10. Machine wash warm Use only non-chlorine bleach when needed Tumble dry low.