Built to move with you, the Smartwool Women’s Intraknit™ Thermal Merino Base Layer Bottom combines warmth, flexibility, and breathability for high-intensity cold-weather activities. Innovative Intraknit™ technology seamlessly integrates insulation, articulation, and ventilation, while Merino Sport yarn pairs the natural benefits of Merino with the durability and quick-dry performance of polyester. Whether you’re skiing, running, or training, these slim-fit bottoms deliver next-level comfort and mobility.

Why You’ll Love It

• Intraknit™ technology blends warmth, flexibility, and ventilation
• Merino wool offers moisture management, odor resistance, and temperature control
• 3D mapping ensures a near-custom fit that moves with your body
• Seamlessly knit mesh ventilation boosts airflow in key areas
• Mid-rise waist for a secure, versatile fit