'Add that extra layer of warmth to your winter training gear with the Under Armour CG Armour Comp Mock. This base layer is made from dual-layer fabric that keeps you ultra-warm and ready for anything. The four-way stretch construction means that you can keep moving freely while the stretch-mesh back keeps you ventilated when you need it the most. Under Armour CG Armour Comp Mock features: Cold mornings, outdoor workouts, and layered game-day fits call for warmth that never feels bulky. Built to sit close and move with you, the Under Armour CG Armour Comp Mock helps keep heat in, sweat moving, and mobility high from first drill to last rep. Size & Fit GuidanceThis top is designed for a true compression fit with a close, body-hugging feel. For the best fit, we recommend ordering your usual size if you want that locked-in base-layer feel; if you prefer easier on-and-off comfort or are between sizes, many reviewers prefer going up one size. Best ForCold-weather training, outdoor work, and layering under uniforms or jackets when you want warmth without bulk. Styling & VersatilityThe streamlined silhouette layers easily under jerseys, hoodies, quarter-zips, and jackets without adding bulk. Worn on its own, the mock neck and clean compression profile deliver a sharp athletic look for training and everyday cold-weather wear. Break-In & DurabilitySome reviewers note the close compression feel becomes more natural after a few wears, especially through the neck and torso. Once in rotation, the fabric is widely praised for holding its shape, warmth, and performance through repeated use and washes. Care & MaintenanceReviewers say it cleans up easily, dries quickly, and stays ready for frequent cold-weather use. Regular washing has also helped many keep it in rotation season after season."