trimfit Girls' Flat Knit Socks 2-Pack 74% Cotton, 23% Nylon, 2% Spandex, 1% Rubber Imported Machine Wash 2-pairs children cotton and nylon flat knit knee-high's 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