High Performance Outdoor Alpaca Socks by AndeanSun: Black and Light Grey These socks will keep your feet warm and toasty in any weather. Alpaca keeps you naturally warm and comfortable while Aloe moisturizes your feet and provides restorative healing to your skin. - 50% Alpaca – 35% Acrylic – 8% Spandex – 5% Elastic – 2% Nylon. - Aloe Infused. - For men and women - THERMAL PROTECTION AND ALOE INFUSED: Alpaca fiber is hollow or semi-hollow allowing for the best natural thermal insulation in cold or warm environments. Alpaca is three times as warm as wool. Aloe infused for extra softness. - ODOR REDUCING: Alpaca fiber is moisture wicking, making these a great option for any type of wear. - EASY CARE & CLEANING: Machine wash cold and tumble dry low heat or lay flat to dry. Brand Size SMALL MEDIUM LARGE X-LARGE Shoe Size 4 - 6.5 7 - 9.5 10 - 12.5 13 - 15 Sock Size SMALL MEDIUM LARGE X-Large