Mountain Hardwear 32 Insulated Half Zip Top - AW16 90% Polyester, 10% Elastane Imported Zipper closure Thermal.Q Elite - Provides a warm synthetic whose structure gives it better compression rebound. Body-Mapping Insulation - Boosts breathability and ventilation. Thumb Loops - Ensures the sleeves from riding up. Reflective Details - Provides visibility in low light conditions. Perfect for Skiing, Running, Training, Backpacking and Hiking