Mens Worlds Best Dad Casual Socks (1 Pair) (Ideal Fathers Day Present) Cotton, Polyester, Nylon Great quality mens socks. Features the writing Worlds Best Dad Eva 10/10 Comfortable fit. Made with 67% Cotton, 16% Polyester, 15% Nylon and 2% Elastane. Machine washable. Would be perfect for Fathers Day! Comes in a gift box so would be ideal for giving to your dad!