This Team 365 Men's Black Zone High - Performance T-Shirt is great for athletes during sports competitions, training sessions, or corporate sponsored sporting events. It's designed for serious male athletes who want both performance and style. Made of 100% polyester interlock, it weighs 3.8 oz./yd2 (130 gsm). It has a snug athletic fit and a heat - sealed label, and uses cationic dyes for bright and long - lasting colors.