'Power through every move with the Under Armour Heatgear Og Compression Mock. Built with thicker HeatGear fabric and advanced sweat-wicking technology, this top delivers superior comfort without sacrificing flexibility—minimizing pinching, snagging, and chafing. The four-way stretch material adapts to your every motion for unrestricted performance, while the light and tight fit provides optimum muscle compression to support your core. Designed for athletes like you, the Under Armour Heatgear Og Compression Mock lets you experience comfort and unstoppable confidence like no other. From gym sessions to game-day layering, this compression top is built to keep you cool, supported, and ready to move. The Under Armour Heatgear Og Compression Mock pairs a light, tight fit with sweat-wicking performance and four-way stretch, so it feels secure without holding you back. Size & Fit Guidance Reviewers say this top fits true to size for the intended compression feel. For the best fit, we recommend choosing your usual size if you want a snug, locked-in base layer; if you prefer a little less compression for casual training or easier layering, some shoppers may prefer sizing up. Best For Best for training, team sports, and wearing under jerseys, pads, or lightweight outer layers. Styling & Versatility The streamlined mock-neck design gives it a clean athletic look that works well on its own or under uniforms, jackets, and polos. Its close-to-body fit makes it an easy go-to for workouts, practice, and everyday layering. Break-In & Durability This top is ready to wear right away, with stretch fabric that feels secure from the start and continues to move comfortably through training. Reviewers also note that it generally holds its shape well through repeat wear and washing. Care & Maintenance For best long-term performance, wash it regularly after workouts to help maintain its fresh feel and compression recovery. Reviewers say it washes well and continues to wear comfortably over time."