The next evolution of ColdGear has arrived! Made of an innovative diamond-embossed fabric that not only bolsters breathability, it also accelerates moisture transport and maximizes core temperature regulation through an innovative "push-pull" construction. The high-loft fleece back locks in body heat, while underarm gussets act as a cooling zone during intense activity. The result is ventilation and moisture transport when you're on the move and maximum thermal insulation when you finally stop. Crafted of a double-sided fabric that wicks moisture away from your skin and circulates body heat. This property plus the ones listed above, in conjunction with its relaxed fit, make it the optimum cold-weather base layer for both active and stationary days in the field. ColdGear keeps you warm, dry and comfortable without weighing you down.