When the mountain calls for an extra layer, this shirt answers. The women’s Burton Midweight X Base Layer Crewneck will keep your personal climate under control, so you can worry about important stuff like which run is next and what to eat for lunch.

Features:
Built-in Climate Control: The Living Lining 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.
Stink Less: Sustainable odor control keeps it fresh without limiting breathability.
Comfy Fit and Feel: Chafe-free seams and four-way stretch feel good no matter how hard you’re working or lounging.
Low Environmental Impact: Bluesign approved materials reduce impact on humans and the planet during manufacturing.
Lifetime Warranty