Built for cold days and high-output adventures, Smartwool's Intraknit Thermal Merino Base Layer 1/4 Zip for men delivers targeted warmth, breathability, and freedom of movement when the pace picks up. Body-mapped insulation and ventilation work together to help regulate temperature, while Merino wool helps manage moisture and resist odors during long days outdoors. The quarter-zip design allows for easy airflow adjustments, and the close-to-body fit layers comfortably under outerwear. Ideal for skiing, snowboarding, winter hiking, and other high-energy cold-weather activities, Smartwool's Intraknit Thermal Merino Base Layer 1/4 Zip for men keeps you comfortable from the first to last chair.
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Merino wool blend for moisture management, temperature regulation, and natural odor resistance
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Strategic stretch and an articulated fit for unrestricted movement on the mountain or trail
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Quarter-zip neckline for adjustable ventilation and easy layering
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Seam-conscious construction to help reduce bulk and minimize chafing during active use
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Winter 2026/27 product
