Lorpen Kid's Merino Ski 2 Pack Socks 37.5% Merino, 37.5% Acrylic, 15% Nylon, 10% EA. Lycra Performance sock maker Lorpen's kids ski socks are fun, fashionable, and warm Made with natural merino wool, socks have an over-the-calf fit with medium cushion and moisture-wicking properties 37.5% merino, 37.5% acrylic, 15% nylon, and 10% lycra; lycra throughout sock means no slipping or bunching up Flat-knit toe seam means no irritation on kids' toes Medium cushioning on the foot for warmth and protection