Part of the curated collection called 'SPECIAL SPECIAL,' these Happy Socks live up to the name with white stripes that shine a brilliant shade of green when the light goes out. This extraordinary pair is sure to delight you especially in the dark. Calf length. Black with green glow-in-the-dark white stripes. Combed cotton-blend rib knit. Designed in Sweden. 66% Cotton, 17% Polyamide, 14% Polyester, 3% Elastane. Size P/S = EUR36-40. Size S/M = EUR41-46.