Extreme temps? Wear the Extreme Twill Base. Comfortable high-loft twill fleece fabric beats back the cold to keep you incredibly warm. Don't worry about overheating while standing still for long periods. Just adjust the quarter-zip. And when it is go-time, stretch panels at the underarms let you aim or go to full draw with ease.
Keep warm in extremes…get this Under Armour® Base Layer Shirt!