The Burton Lightweight Baselayer Crewneck top layers under a shell in winter and stands on its own once the weather warms, with a Living Lining that wicks faster when the body heats up and holds warmth when it cools. That same reactive lining keeps the fabric quick-drying in any season, so one top covers a cold chairlift morning and a warm spring hike alike. What Our Gearhead(R) Experts Are Saying:"I wore this solo on a warm spring tour after using it as a base layer all winter, and it dried out fast enough after a sweaty climb that I never felt damp on the way down. It's the one top I never had to think about packing, no matter the forecast."