TCA Men's & Boy's Pro Performance Compression Shirt Long Sleeve Base Layer Thermal Top - Crew/Mock Neck Lightweight and tight TCA compression fit improves muscle power and endurance Moisture wicking fabric is QuickDry and absorbs sweat from the skin keeping you dry and comfortable Flat lock seams eliminate chafing and four way stretch for full range of movement Breathable fabric regulates body temperature for higher performance in all conditions Versatile performance top designed for intense workouts: running, gym or training