Versatile Baselayer:- This Performance Half-Zip Is The Perfect First Layer In Winter, Or A Stand-Alone In Spring Or Fall. Unzip The Collar For Cooling.Warm And Dry:- Our Thermal-Reflective Lining Holds Heat In, While The Wicking Fabric Keeps You From Getting A Chill.Performance Fit:- The Ergonomic, Body-Contouring Seaming Is Made To Move, And Thumbholes Keep The Sleeves In Place.Features:- Omni-Heat™ thermal reflective- Omni-Wick™- 4-way comfort stretch- Antimicrobial treatment protects this product from bacterial growth- Ergonomic seaming- Flatlocked construction- Thumb holesSpecifications:Fabric:- Omni-Heat™ Reflective Anytime Stretch Jersey 85% polyester, 15% elastaneTechnology:Omni-Heat Reflective:- Thermal-reflective Warmth: Revolutionary silver dots reflect and retain body heat for enhanced lightweight warmth.Omni-Wick:- Performance Wicking: Our enhanced wicking technolo8y moves moisture away from the skin and disperses it across the fabric surface for rapid evaporation that helps you stay dry and comfortable while being active Outdoors.