You work hard and play hard, so there's no way you're going to let the heat keep you from performing at your best. And that's why you need the Nike Men's MLB AC Hypercool Three-Quarter Baselayer shirt. This base layer boasts mesh fabric for cooling ventilation and breathability. It's crafted with spandex so that the material will move with you, never against you. And the best part? This shirt flaunts your favorite team's logo boldly at the front.