Did someone call for climate control? This men's Burton Heavyweight X Base Layer Quarter-Zip will do the work. Highly breathable, heavyweight fleece keeps you cozy even on the coldest of mountain days, and four-way stretch works to give you all the flexibility you need for a solid day of riding. Bonus: you can still keep your friends close, thanks to the stink-resistant finish. (You're welcome for that one.)   FEATURES: Slim fit sits close to the body, with room for the garment to move with you. 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.