Our warmest UA Base keeps you comfortable in even the extreme chill of a cold treestand. Exclusive UA Scent Control technology lasts longer & works better, keeping you undetected. Soft, brushed negative grid interior traps hot air, providing superior warmth . Strategically placed 4-way stretch panels add stretch & dump excess heat. Material wicks sweat & dries really fast. Anti-odor technology prevents the growth of odor-causing microbes.