Brushed microfleece fabric on lower body & back is soft on both sides & delivers superior warmth. Strategically placed ColdGear Infrared technology uses a soft, thermo-conductive inner coating to absorb & retain your own body heat. Material wicks sweat & dries really fast. Smooth tricot knit fabric with woven overlay on upper body & shoulders for added durability & protection. Generous ½ zip front makes for easy layering. Raglan sleeves.