Running in winter with the same comfort you have in summer: now you can. The UYN EXCELERATION tights are designed to provide a barely-there feeling and to reduce the risk of chafing and discomfort. The benefit of the Exceleration tights, however, can be felt: the soft, gently brushed fabric provides the right level of warmth and breathability. At the quadriceps and calves, HEATMEMORY technology keeps the muscles warm and efficient. Ready to release new energy.