With Graduated Compression engineering in the arms to promote maximum blood flow, the 2XU Long Sleeve Compression Top utilizes powerful PWX FLEX fabric to reduce arm fatigue and "pump" in the forearms while strengthening the core muscle groups in the trunk of the body allowing you to maintain better posture and enhanced breathing while training and competing. The 2XU Long Sleeve compression tops also provide an unrestricted range of motion by utilizing a raglan construction in the shoulders, ensuring that you are comfortable to train and compete at your best.