Lycra® support bands in the arch & ankle area prevent slippage & rotation. Double cuff gently holds the sock in place. Flat toe seams enhance comfort.Y-shaped heel seam for wraparound fit. Merino wool & Meraklon fibres combine superb warmth with the ability to wick moisture away from the foot. Fibre Content 51% Merino wool, 34% Meraklon (Polypropylene), 14% Polyamide, 1% Lycra® (Elastane)FEATURES 53% Merino wool for insulation & warmth Lycra support bands in the arch & ankle area prevent slippage Double cuff gently holds the sock in place Flat toe seams enhance comfort Y-shaped heel seam for wraparound fit 4 sizes available for a precise fit