Size: Women's 5-9Also fits: Men's 4-8Women requiring size 8-13 can look at Men's styles or Women's Big/Tall.The first and original Heat Holders Crew sock!Keep feet warm on the coldest of days and pull on this pair of solid color crew length Heat Holders for women, the warmest thermal sock.Thick, chunky and with a massive tog rating of 2.34, Heat Holders are made from a specially developed heavy bulk yarn which has extreme thermal qualities. With long pile cushioning, these thermal socks will help keep feet fully comfortable and supported.The inside of each sock has been intensively brushed that not only feels sensationally soft but also traps warm air close to the skin keeping your feet warmer for longer.Heat Holders thermal socks are also designed and built to be non-binding.Fiber composition: 91% acrylic, 5% nylon, 3% polyester, 1% elastaneAdvanced thermal yarnMore than 7X warmer than a basic cotton sock!Sensationally softNon-bindingSingle pair packImported