Sidas Synergy Fit Performance Merino Grey Coral Ski Socks A precise, high definition ski sock with a grip strip to improve skin contact, made from organic merino wool to wick moisture and provide warmth. Key Features: Synergy Fit Line Ecotech Construction Grip Yarn Recycled Polyamide 43%, Organic Merino Wool 38%, Polyamide 10%, Recycled Elastane 4%, Elastane 3%, Silicone 2% Sidas Synergy Fit Performance Merino Grey Coral Ski Socks