Real mountain warriors know the key to staying warm on the hill starts with the layer that's closest to the skin. With a super warm base layer like the Burton Heavyweight X Quarter-Zip Base Layer Top, you can be toasty warm in your shell, even on the coldest days of winter.

Four-way Stretch Fabric

Heavyweight 300 Living Lining – Cold mornings to sunny afternoons, fast turns to slow chairlifts—a day on the hill is filled with extremes. Burton’s Living Lining offers automatic climate control without added bulk or weight, so the one thing you can count on is consistent comfort. When you’re warm, breathable pores on the Living Lining expand to release excess warmth and prevent overheating. When you’re cold, breathable pores on the Living Lining shrink to trap body heat and keep you warmer for longer. Provides consistent temperature regulation without adding bulk or weight.

Slim Fit – Sits close to the body, with room for the garment to move with you.

Quick Drying and Highly Breathable

bluesign® Approved Product – The bluesign® system unites the entire supply chain to reduce impact on both humans and the planet. bluesign® approved materials are guaranteed to use only safe chemicals and are manufactured to meet the highest standards of natural resource conservation, consumer and worker health, and clean air and water discharge during the manufacturing process.