Slap On 360 Retroreflectivity for Evening Runs. Add an extra reflective element to stay safer on your evening runs with this running accessory. It's 360 retroreflectivity keeps you visible in low light, and it is completely versatile and customisable. The slap-band design makes for a great hold and perfect fit, and you can wear it on your arm or leg. Add this running accessory to your workout wardrobe for some added safety after dark.