Fit & Design: Slim fit Merino sport yarn combines the power of Merino with the durability and fast dry times of polyester Seamlessly knit mesh ventilation designed to keep you dry and comfortable 3D mapping provides maximum mobility while ribbed elbows provide added durability Lightweight, super-moveable top, made for all your most extreme cold-weather activities Gender-specific ventilation perfectly placed to maximize thermoregulation and breathability Technology: Intraknit(TM) technology: Insulation, articulation and ventilation are seamlessly integrated to amplify movement and comfort during high-intensity activities