PUMA Pr Pure Women's Winter Long Running Tights warmCELL Technology - A highly functional and breathable material that retains heat close to your body to maintain your optimum temperature when it's cold outside. Brushed Fabric Lining - For a comfortable feel and top performance to keep you warm in cold conditions. Mesh Ventilation Inserts - For keeping you cool and helps wick sweat away during training. Articulated Knees - For enhanced range of motion and freedom of movement. Flat-Lock Stitching - Smooth stitching increases garment comfort inside and out, leaving you with a more streamlined feel and improved fit.