The Smartwool Men's Classic Thermal Merino Base Layer Bottoms are midweight thermal base layer bottoms designed to keep him warm, dry, and comfortable during cold weather adventures. Made from 100% Merino wool, these base layer bottoms naturally regulate body temperature, manage moisture, and resist odors to help him stay fresh through long days on the mountain or trail. The interlock knit construction delivers a soft next-to-skin feel while providing the warmth needed for skiing, hiking, running, and other winter activities. Flatlock seams reduce chafing, and the slim fit follows the body's natural contours for easy layering under outerwear. With a comfortable Merino-lined waistband and functional fly, these base layer bottoms are built to deliver dependable performance from first chair to last run.

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