Terramar Thermolator 1/2-zip Top... a temperature-regulating base layer to keep you feeling just right! This Top adapts to your body temperature, warming you up when you're cold and letting excess heat escape when things start to heat up. The result? All-day comfort outdoors! To vent even more heat, you can unzip the 1/2-zip neck. Since this Top is soft, stretchy, moisture wicking and warm, it's the perfect layer for all your favorite outdoor activities. Hunting, hiking, walking the dog or shoveling snow, you'll be warm and comfortable, never too hot or too cold. 86/14 polyester / spandex construction; Climasense TR thermal-regulating technology adapts to your body temperature; Mesh breathable backing to keep you comfortable; Soft, midweight brushed fabric; 1/2-zip neck; 360 degree stretch; Moisture wicking; Odor control for lasting freshness; Machine wash / dry; Imported. State Color and Size. Looking for a better base layer? Look no further! Order yours today! Terramar Thermolator 1/2-zip Top