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Innerwear that captures your body heat and uses it to generate warmth.

HEATTECH is UNIQLO’s lightweight innerwear that converts moisture from your body into heat, keeping you comfortable all winter long.

CHOOSE FROM THREE LEVELS OF WARMTH

LEARN HOW HEATTECH WORKS

illustration of details behind the heattech technology

This thin, lightweight fabric generates warmth from body heat.

Rayon fibers absorb moisture from your body and convert it into heat, creating a self-heating loop between your body and the fabric.

illustration of details behind the heattech technology

Made from special fibers the stop heat from escaping.

Ultra-fine microfibers—10 times finer than human hair — keep warm air in, providing continuous insulation.

illustration of details behind the heattech technology

Breathable fabric keeps you fresh and dry.

Our innovative HEATTECH fibers are blended with fibers that release excess heat and moisture, which help to keep you feeling dry.

WATCH US PUT HEATTECH TO THE TEST

Years of research resulted in HEATTECH, a fabric that's moisture-wicking and bio-warming.

Special ultra-fine fibers create insulation, helping to retain warmth for a longer time.

HEATTECH features all-direction stretch, allowing you to move freely with a comfortable fit.

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