Our thickest, warmest boot socks Perfect for chilly weather! Fewer Blisters with Alpaca socks and great for rugged outdoor use or with boots Made in Peru with: 48% Alpaca, 40% Acrylic, 8% Nylon, 4% Elastic Women Size: Small 5-8, Med 8-10, Large 10-12; Men's Size: Small 4-7, Med 7-9, Large 9-11, XL 11-14 Care Instructions: Machine wash warm, cool or air dry Alpaca Direct Extreme Winter Boot Socks - These thick and lofty alpaca socks are perfect for keeping your feet toasty during the chilly winter months or for outdoor expeditions! Extra thick & Durable warm socks for comfort and warmth! These Alpaca Boot Socks can be put in your washer without the worry of shrinkage!