Stay warm and comfortable with our Men’s ’HEATTECH' T-Shirt, UNIQLO's essential thermal base layer designed for everyday cold-weather wear. Powered by advanced ’HEATTECH' technology, this T-shirt captures body moisture and converts it into heat, delivering lightweight warmth without the bulk. The soft, stretchy fabric ensures a snug fit that moves with you, while moisture-wicking properties keep you dry and fresh throughout the day. Whether layered under outerwear or worn on its own, this thermal tee offers insulation and versatile style for winter activities.

- ’HEATTECH' Thermal Technology: Generates and retains heat from body moisture for consistent warmth.
- Lightweight Heat-Retaining Fabric: Provides insulation without added bulk.
- Moisture-Wicking Properties: Keeps you dry and comfortable throughout the day.
- Stretchable Material: Offers a flexible fit that moves with your body.
- Versatile Thermal Base Layer: Ideal for layering or wearing on its own in cold weather.

Compare 3 Types of 'HEATTECH' Fabric:

'HEATTECH'
- Lightweight yet warm, ideal for everyday layering.
- Recommended for 41 °F to 68 °F for mild winter days or cozy indoor wear.

'HEATTECH' Extra Warm
- About 1.5× warmer than original 'HEATTECH', offering added insulation without bulk.
- Perfect for colder days with recommended temperatures from 23 °F to 59 °F.

'HEATTECH' Ultra Warm
- Our warmest option, approximately 2.25× warmer than original 'HEATTECH'.
- Designed for more extreme cold with a recommended range of –4 °F to 50 °F.