We built the Basin + Range Park It Polar Fleece Crewneck around a classic pullover shape, one that works as easily solo as it does under a shell. Polar fleece traps warmth through cool fall days and evenings, and a relaxed fit leaves room to layer underneath when the temperature really drops. What Our Gearhead(R) Experts Are Saying:"I've worn this straight through a fall evening around the fire without reaching for a jacket. It's the first thing I grab once the sun starts going down and the air gets that edge to it."