Bridgedale's Hike All Season Junior Socks have used a complex blend of fibres to create a true all-year junior backpacking and trekking sock. __ Merino wool provides impressive cushioning and warmth with natural antibacterial properties, while the Endurofil fibres wick moisture away to keep feet your refreshed. These fibres are woven around a tough Nylon framework for longevity and finished with a touch of Lycra for a close, wrinkle free fit. __ Terry looping around the ankle gives added protection without dramatically increasing bulk.__31% Merino Wool 37% Nylon / Polyamide31% Endurofil / Polypropylene 1% Lycra / Elastane