The Men's Burton Midweight Base Layer Crewneck hits the sweet spot for versatile mountain performance. Midweight construction delivers enough warmth for cold days while remaining breathable enough for high-output activities — the base layer you reach for most. Climate control technology manages heat and moisture, and the slim fit layers cleanly under any outerwear.

• Regular fit is just right: Not too tight or too baggy
• Built-in Climate Control. The Midweight 200 reacts to your body temperature, accelerating moisture wicking when you're hot and retaining warmth when you're cold for balanced comfort all day long.
• Four-way stretch fabrication for enhanced mobility
• Stink Less. The sustainable Odor control of HeiQ Fresh keeps it fresh without limiting breathability.
• Chafe-free softlock seams for added comfort
• bluesign® approved materials use only safe chemicals and reduce impact on both humans and the planet during manufacturing
• Lifetime Warranty