Wear these socks in conjunction with your existing footware to give yourself a real heat boost! Breathable polypropylene material wicks moisture away from the body Brushed ´fleece´ inner providing excellent thermal qualities Dries very quickly after use and washing due to the hydrophobic (water repellent) nature of polypropylene Wear beneath Hot Socks as an insulating layer during winter for incredible warmth Ideal for a range of outdoor activities in the colder months including road cycling, mountain biking, kayaking and skiing PolyPro Sock Size Shoe Size     UK Europe USA Junior 1-3 33-36 1½-4 2X-Small/X-Small 3½-5 36.5-38.5 4½-6 Small/Medium 5½-7½ 39-42 6½-8 M-Large/Large 8-10½ 42.5-45.5 8½-11 X-Large/2X-Large 11-12 46-47 11½-12½