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. Fitted: Next-to-skin without the squeeze UA Storm technology repels water without sacrificing breathability Breathable insulation through sleeves, back & side with lightweight spacer fabric & woven overlay on front for wind protection Unique hybrid construction keeps you warm without losing breathability Generous ½ zip front makes for easy layering Style #: 1360515 Body: 100% Polyester Woven Panels: 87% Polyester/13% Elastane Imported