NOTHING BUT COMFORT.Medium, full-cushioning is perfect for a long day outside in cooler weather. Features our original technical fit system that allows your foot and sock to flex without bunching. A flat-knit toe seam keeps you comfortable.FEATURES Medium full cushion leg and foot Flat knit toe seam Sock Height: CrewTECH SPECS Material: 66% Merino Wool, 33% Nylon, 1% Elastane Warranty: Lifetime