All Day Comfort, Trekking & Hiking. Junior: Durable performance for kids. Trekker: Designed for any-season, Hiking, Trekking and Backpacking. Excellent durability for tough usage, yet soft and comfortable for sensitive feet Fibre Content: 37% Nylon/polyamide 31% New Wool 31% Endurofil™/polypropylene 1% Lycra®/elastane