Compared to our LITE™, medium long loop length thermal socks with 1.60 Tog rating (Thermal Overall Grade), Heat Holders® ULTRA LITE™ thermal socks have a short loop length with 1.04 Tog rating. Keep feet warm on the coldest of days and pull on this pair of floral pattern, lightweight, crew length Heat Holders® ULTRA LITE™ for women, the warmest thermal sock. Heat Holders® are made from a specially developed heavy bulk yarn which has extreme thermal qualities. The inside of each sock has been intensively brushed such that they not only feel sensationally soft but also trap warm air close to the skin keeping your feet warmer for longer. Heat Holders® are non-binding. They are also diabetic friendly and provide relief for cold feet due to circulation problems. Fiber composition: 89% acrylic, 10% nylon, 1% elastane Advanced thermal yarn Sensationally soft More than 3X warmer than a basic cotton sock! Non-binding, and diabetic friendly Machine washable Single pair pack M018