Amphipod Xinglet For the nighttime road warriors and racers, the Amphipod Xinglet is just what you need. This innovative vest offers 100% more visibility than standard running vests in an ultra-lightweight package. Runners can take on mile after mile, even after the sun goes down, thanks to special reflective booster zones at the back and front of the vest. Running will be the focus with this zero-distraction safety accessory. Comfortable stretch design can fit over a shirt or light training jacket. 360 degree reflectivity helps enhance visibility while running in low-light conditions. The SwiftClip™ at the front to take vest on and off easily. Sizing Fits size XS to XL.