FALKE Sanja Seamless Women's Running Jacket Quick-Drying - Keeps your body comfortably dry. Optimum Ventilation - Three-dimensional knitting technique with an open mesh structure provides ideal ventilation. Innovative Circular Knitting Technology - Reduces friction and irritation that can occur from garment seams. Optimum Freedom of Movement - Highest comfort for the wearer using maximum elastic. Targeted Heat Insulation - Keeps you warm when needed.