Experience unmatched warmth and comfort with Women's ’HEATTECH' Ultra Warm Leggings, the ultimate thermal base layer for cold weather. Designed with advanced ’HEATTECH' technology, these thermal leggings trap body heat and convert moisture into warmth, offering superior insulation without added bulk. The ultra-soft, heat-retaining fabric stretches to fit your body, making them ideal for layering under winter outfits or wearing on their own for cozy indoor lounging. Whether you're braving the chill outdoors or staying snug inside, these thermal leggings deliver reliable warmth and comfort all season long.

- ’HEATTECH' Thermal Technology: Converts body moisture into heat for consistent thermal insulation.
- Extreme Cold Protection: Our warmest thermal base layer, specifically designed for comfort in temperatures ranging from -4°F to 50°F.
- Ultra Warm Heat-Retaining Fabric: Provides maximum warmth while remaining lightweight.
- Soft, Stretchable Thermal Knit: Ensures a snug fit that moves with you and retains heat.
- Versatile Thermal Base Layer: Perfect for layering under pants or wearing alone.
- Cold Weather Essential: Ideal for winter sports, commuting, or relaxing indoors.

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.