Best F*king Mom Socks are a great gift for the best mom! Unisex Crewcut Adult Socks. 54% cotton, 42% polyester, 4% Elasrance. Care: Machine wash on cold. Only use non-chlorine bleach if needed. Tumble dry on low. Iron if needed only on low heat setting. One-Size sock size 9-11, W 4-10.5 M 3-9