Canterbury Mercury TCR Control Long Sleeve Compression Top Graduate Compression - Delivers more oxygen filled blood to active muscles to increase power and stamina. Excellent Moisture Management - Keeping you cool and dry in hot weather, meaning you body won't overheat. There are vents under the arms that helps in this process. Reduced Number of Seams - And those that are present are flat to reduce chafing and to provide maximum comfort and enhanced compressive value, meaning you can concentrate on the game or your intense training. Anti-Bacterial Coating - Helps to keep your body cool and free of germs and bacteria.