In addition to the 4-way stretch nylon that offers maximum flexibility when picking up the pace during a run, this vest has a DWR treatment to fend off summer rain showers. The partial mesh lining increases breathability for added comfort while blocking chilly gusts of wind. With zipped hand pockets, you have room to store essentials like credit cards and car keys, while elasticated arm holes and hem provide a secure fit. The Flash Sky Vest for women is an ideal extra layer for summer endurance sports.