The Ronhill Advance Velocity Short Sleeve Running T-Shirt provides maximum comfort & lets you perform at your highest level with its blend of lightweight fabric, mesh panels for breathability, & flat-lock seams for comfort. The top is manufactured with Vapourlite fabric, designed with a lightweight knitted construction. The fabric draws moisture away to the outer surface, which then evaporates into the air, enhancing comfort whilst running. Garments manufactured from Vapourlite are breathable & ultra quick-drying. Mesh panels work with the Vapourlite fabric to allow further ventilation & breathability, helping to keep you at an optimum temperature & comfort level. A combination of flat-lock seams & bonded technology creates a smoother seam, reducing the risk of chafing & increasing your comfort level whilst exercising.