1.5X warmer and thicker than regular Heattech, HEATTECH EXTRA WARM features a raised nap lining which makes it ideal for very cold days.

Our innovative Heattech staples are made from a revolutionary material that captures heat and retains it so you'll stay warm all winter. Designed to be worn solo or under layers, our regular Heattech offers light warmth, while the extra warm varieties offer 1.5x more warmth than regular. Think chilly days when you’re in and out of the cold. For extreme weather you’ll want ultra warm.