Under Armour 1204270 Men's Undeniable Armour Fleece Hoody - Navy UA Armour Fleece fabrication offers warmth without the weight. For when it's cold. Keeping athletes warm, dry, and light. Ideal use: Temperatures under 55 degrees F. ColdGear features a double-sided fabric that wicks moisture from the skin and circulates body heat. It accomplishes the impossible by keeping athletes warm without weighing them down.