trimfit Boys' ' Rib Cotton Crew Comfortoe 3-Pack 65% Cotton, 29% Nylon, 4% Spandex, 2% Rubber Imported Machine Wash 3-Pairs toddler boys cotton crew socks Comfort technology Machine wash cold with like colors. Only non-chlorine bleach when needed. Tumble dry low. Do not iron Trimfit. Wear tested and reg since 1921