A pair of understated dark gray socks, accented with a striking bright yellow subway train head—This is an absolute must-have fashion piece for any subway enthusiast! Unisex Material: Cotton 75% Polyamide 22% Elastane 3% Washing and Caring: We recommend a washing temperature of 40°C for our socks. Please avoid bleaching and ironing. Although our socks are very durable, they will last longer if they are not put in the dryer.