The Women's Burton Lightweight X Base Layer Crewneck is the base layer that earns its place in your kit year-round. Light enough to wear on warm spring days and breathable enough for high-output activities, it layers under a shell in deep winter or wears solo in shoulder seasons. Living Lining® technology with HeiQ Smart Temp keeps you in the performance zone regardless of the activity.

• Slim fit sits close to the body, with room for the garment to move with you
• Built-in Climate Control. The Living Lining® with HeiQ Smart Temp 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
• Quick-drying and highly breathable
• 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