'Weather the heat in ultimate comfort during any training session. From early-morning practices to warm-weather training, this long-sleeve compression top helps you stay dry, supported, and ready to move. The Under Armour HeatGear Armour Comp L/S T-Shirt delivers a smooth, second-skin feel that works well on its own or layered under a jersey, with lightweight stretch fabric built for workouts, team sports, and everyday training. Size & Fit Guidance Reviewers consistently describe the fit as true to its compression design: snug, supportive, and easy to move in. For the best fit, we recommend your usual size if you want a close-to-body performance feel, or sizing up if you prefer a little more room through the chest, shoulders, or torso. Best For Best for layering under uniforms, outdoor practices, workouts, and training in changing temperatures. Styling & Versatility Clean, athletic, and easy to wear across a range of settings, this top transitions from sport-specific layering to gym sessions and everyday active use. Reviewers especially like it as a dependable base layer for baseball, soccer, cycling, golf, and outdoor work. Break-In & Durability Most reviewers say it feels comfortable right away, with stretch fabric that stays supportive without feeling restrictive. Long-term feedback also points to strong shape retention and reliable performance through repeated wear and washing. Care & Maintenance Reviewers note that the fabric washes well and holds its color and fit over time, making it an easy option for frequent training-day rotation."