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.