Double-knit insulation in the front is soft but packs incredible warmth .Dual-layer fabric with an ultra-warm, brushed interior & a slick, fast-drying exterior .ColdGear Infrared technology uses a soft, thermo-conductive inner coating to absorb & retain your own body heat .ColdGear mesh underarm & inside elbow panels deliver strategic ventilation .4-way stretch fabrication allows greater mobility in any direction .Material wicks sweat & dries really fast .Anti-odor technology prevents the growth of odor-causing microbes .Hand pockets with a right-side power-mesh internal pocket for your phone .Reflective logos & print on side panels for greater visibility on low-light runs .