Under Armour Mens Base 3.0 Crew (XX-Large, Black) ColdGear UA Base 3.0 is heavyweight protection, trapping a ton of warmth, for times when you know you'll need it Lightweight 4-Way Stretch construction improves mobility and accelerates dry time Soft, moisture-wicking interior regulates your core temp, keeping you dry and comfortable Anti-Odor technology prevents the growth of odor-causing microbes to keep your gear fresher, longer Raglan sleeves, ergonomic seam placement, and flatlock stitching allow superior mobility without chafing