Our garments are made with performance enhanced materials that offers one or more assistance to the wearer such as wicking, UV protection, anti-bacterial. Wearing our clothing made with advance material also helps to keep the athlete cooler, dryer and hence less fatigued. Supports and trains the whole width of the upper back, saving energy and Improving posture Improves strength and stamina, providing a smoother and stronger running arm Swing and throwing motion Fabric Composition: 86% Nylon, 14% Spandex Mens: Size Chest Waist: Sm 34-36 in 28-29 in Md 38-40 in 30-32 in Lg 42-44 in 34-36 in Xl 46-48 in 38-40 in Xxl 50-52 in 42-44 in