Men's Base Layers

Men’s Merino Wool Base Layers: Comfort That Stands Up to Every Challenge

Start every adventure with the most reliable technical apparel. Smartwool’s collection of men’s Merino wool base layers is the foundation you need for uncompromising performance and comfort, designed specifically for men who demand the most from their gear, no matter the conditions. Merino wool is Smartwool’s secret weapon: these base layers are engineered to excel at thermoregulation. They keep you warm and insulated in extreme cold without causing overheating when activity levels rise. Thanks to the fabric’s natural breathability, moisture is managed quickly, keeping you dry and reducing the risk of getting chilled.

Choose the Perfect Level of Insulation

• Intraknit™ Thermal Base Layers: Our most advanced base layers, featuring 3D body mapping for targeted ventilation and flexibility. Perfect for high-intensity activities where precise fit is essential.

• Classic Thermal Merino (250 g/m²): The ideal choice for superior insulation and long-lasting warmth in the harshest winter conditions.

• Classic All-Season Merino (150 g/m²): Our versatile, lightweight option, perfect for everyday comfort and hikes in milder climates.

• Intraknit™ Active: Designed for high-intensity activity, these base layers combine the softness of Merino wool with the durability of polyester, delivering exceptional breathability and ultra-fast drying.

To complete your men’s technical wardrobe, explore our range of men’s Merino wool midlayers and jackets, designed to provide extra warmth without restricting movement—perfect on their own or layered over base layers. Try our best Merino wool base layers and discover why they’re considered among the top performers on the market.
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