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 that not only feels sensationally soft but also traps warm air close to the skin keeping your feet warmer for longer.
Heat Holders ULTRA LITE have a TOG rating of 1.0 (Original Heat Holders have a TOG rating of 2.3)
These Ultra Lite Ski socks also have the added benefit of a Reinforced Heel

Heat Holders® are non-binding. They are diabetic friendly and provide relief for cold feet due to circulation problems.

Fiber Composition: 89% Acrylic, 10% Nylon, 1% Elastane.