73% Cotton, 24% Polyester, 3% Spandex TeeHee Birthday Cotton Crew Socks for Women and Men 4-Pack. Something special for the birthday boy or girl to wear around on their day. Not too thick or too thin, suitable for Spring, Autumn, Home, Office, Every Day Use. High quality cotton provides a more stable and stretchy finish than basic weaves, breathable, absorbent, and deodorizing! Afforable, cute socks engineered to stay soft on your feet. Sizing Guidelines: Women’s 9-11 (US Women’s shoe sizes 6-9), Men’s 10-13 (US Men’s shoe sizes 8-11). Machine Washable, Imported.