NIKE Mens Dri-Fit Pro Hypercool Fitted Training Shirt Aqua Blue 92% Polyester/8% Spandex Machine Washable The Nike Pro Combat Hypercool Compression Speed Men's Shirt is our lightest, most breathable base layer to date Aerodynamic flat seams and a compression fit make it ideal for layering under a game-day uniform Dri-FIT fabric and mesh panels help increase airflow and wick sweat away for breathability and comfort during intense workouts Rib crew neck with interior taping for a comfortable fit. Underarm gussets for enhanced range of motion. Sublimated print pattern for modern style Compression fit for a snug feel and enhanced range of motion.