HEATTECH is a cutting-edge garment technology designed by UNIQLO to keep you warm when you need it most. It provides a solution to the cold by transforming perspiration into heat whilst also keeping you dry.


The secret behind the warmth of HEATTECH actually isn’t a secret at all, but a case of science and an immense amount of research. HEATTECH’s most vital quality is that it uses moisture released by the body to re-emit heat. Our HEATTECH range targets insulation and endurance throughout colder conditions. Insulating ‘thermal wear’ at cutting-edge material thicknesses will keep you warm throughout our fall/winter seasons.

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

2.2X warmer and thicker than regular Heattech, HEATTECH ULTRA WARM is our warmest Heattech, which makes it best for intense cold.