Intraknit All-Season Merino Base Layer – Men's

Built for high-output days in unpredictable conditions, the Intraknit All-Season is our top merino base layer pick for serious outdoor athletes. Smartwool's Intraknit construction places mesh ventilation exactly where you run hot, so airflow goes where you need it without sacrificing coverage. Merino's natural odor resistance means you can wear it hard, pack it light, and skip the mid-trip laundry.

• Intraknit construction places targeted mesh ventilation zones at high-heat areas for active airflow management
• Merino wool blend naturally regulates temperature, wicks moisture, and resists odor through multi-day use
• Seamless knit construction eliminates chafe points and reduces bulk under a shell or pack harness
• All-season weight works standalone on cool mornings or as a foundational layer when temps drop further
• Available in Black, Nightfall Blue, Winter Moss, and Dark Mink across S–XXL sizing