HUNT WARMERA light layer of insulation makes the Sitka Women's Core Midweight Long-Sleeve Crew Shirt an ideal layering piece in frigid temperatures. Polygiene Odor Control technology neutralizes odor by limiting the growth of odor-causing bacteria. The microgrid fleece backer adds a light insulation while actively pushing moisture away from the skin to keep you dry. FEATURESPolygiene Odor Control technologyMicrogrid fleece backer adds insulationIdeal layering piece in frigid temperatures