The Under Armour UA RUSH HeatGear Seamless Illusion Short-Sleeve T-Shirt for Men brings the athletic shirt you wear when it matters mostyour toughest workouts, your biggest games, your most intense training. It fits great, keeps you dry, and makes you feel like you can crush every PR. This Under Armour T-shirt has exclusive UA RUSH infrared technology that reflects your body's energy to help you work harder and recover faster. Virtually sew-free construction puts an end to shirt chafe. Soft, knit fabric with engineered, mapped mesh ventilation keeps you cooler under pressure, while 4-way-stretch fabrication allows a more flexible fit. Fast-drying, moisture-wicking power keeps you dry and focused. 53% nylon/47% polyester. Machine wash. Imported.Manufacturer style #: 1366150. 53% nylon/47% polyester UA RUSH energy-reflecting technology Soft, knit fabric Engineered mesh ventilation Nearly sew-free construction 4-way-stretch fabrication Fast-drying Moisture-wicking