Stay ready for cold-weather training with the Under Armour Mens ColdGear Base 4.0 Crew Long Sleeve Shirt. Built to help lock in warmth without adding bulk, this performance base layer is designed for athletes who push through frosty mornings, windy commutes, and hard outdoor sessions. The soft, close-to-body fit feels smooth and comfortable against the skin, while the long sleeve crew cut makes it easy to wear on its own or comfortably layer under jackets and outerwear. Engineered for dependable cold protection, this base layer helps trap heat so you can stay focused when temperatures drop. The streamlined black and white design delivers a clean, athletic look that works in the gym, on the trail, or during everyday wear. Whether you are training, commuting, or spending long hours outside, this shirt offers the warmth and mobility you need to keep moving with confidence. Under Armour Men's Coldgear Base 4.0 Crew Top Longsleeve Black/White Shirt 6005300-00100, 3XL