Under Armour Mens Storm Daytona ½ Zip - ROYAL / ACADEMY / REFLECTIVE
This is the one layer you don't have to keep taking off and putting on all day. That's because it actually adapts to the temperature, keeping you warm when it's cool, but letting out extra heat as the day gets going.
UA Storm technology repels water without sacrificing breathability
Breathable insulation paired with lightweight, smooth spacer fabric for just the right amount of warmth