Details from Burton:
Turn up the climate control on the coldest days with highly-breathable, heavyweight fleece pants.
Stink-free warmth, close-quarters fun ahead. The women's Burton Heavyweight X Base Layer Pants knows this saying well. They're geared up with climate-controlled, highly-breathable, heavyweight fleece. Keep your music close in the easy-access dual phone-stash pockets.
Next-to-skin fit hugs the body with minimal extra fabric
Heavyweight 300 Living Lining® provides consistent temperature regulation without adding bulk or weight
Four-way stretch fabrication for enhanced mobility
Quick drying and highly breathable
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