This heavyweight trail classics sock is mostly wool and has a classic/heritage feel. Model: F2044 Color: Grey Twist (050) The Original ragg wool socks Built tough to last for decades Heavyweight feel and thicker foot Crew length to fit over standard height boots Great for outdoor activity, and warmth in colder temps Single pair per pack This sock is great for use with sneakers or boots 76% Wool, 22% Stretch Nylon, 2% Spandex SIZING: Medium - Men's 5-9.5 Shoe, Women's 6-10 Shoe Large - Men's 9-12 Shoe, Women's 10-13 Shoe X-Large - Men's 12-15 Shoes, Women's 13+ Shoe