This lightweight running vest is a perfect layering piece. Full front zip for easy on and off. Dri-Fit helps move perspiration away from your body and keeps your core warm at the same time. Ideal as a base layer this style has a body skimming fit. Flat seam construction is used throughout to help prevent chafing. Dropped length in the back for extra coverage. Reflective heat transfer dots on backside for added visibility and safety. Swoosh logo detail on upper left chest. 89% polyester and 11% spandex. Machine washable.