Klim Solstice 2.0 Long-Sleeve Shirt Women's Undergarment Snow Snowmobile Body Armor - Black/X-Small Mechanical fabric construction accelerates moisture transfer from skin to mid-layers/outerwear Thermal Mapping technology incorporates SOLSTICE 1 fabric in high heat and mobility zones Smooth surface for bunch-free fit under fleeces and outerwear Enhances breathability and comfort of KLIM outerwear systems Low-profile flat-lock seams