Men's Classic Thermal Merino Base Layer Bottom

SMARTWOOL Men's Classic Thermal Merino Base Layer Bottom

Stay warm, dry, and comfortable from first chair to last mile with these performance-driven thermal bottoms. Updated for a better fit and improved functionality, the Men's Classic Thermal Merino Base Layer Bottom delivers the natural power of 100% Merino wool in a streamlined, next-to-skin design that moves easily under ski pants, hiking layers, or everyday winter gear.

Designed for cold-weather performance, these base layer tights help regulate temperature, manage moisture, and provide breathable warmth without bulk—so you can stay focused on the adventure, not the forecast.

Why you'll want them

• 100% Merino wool for natural warmth, breathability, and softness
• Updated fit for better comfort and mobility
• Thermal performance that helps keep you going longer in cold conditions
• Slim, low-bulk design layers smoothly under outerwear
• Ideal for skiing, hiking, snowboarding, camping, hunting, and everyday winter wear

Whether you're training, traveling, or tackling the outdoors, these classic thermal bottoms are a cold-weather essential built to perform.