You can't put a price on this item! I keep mine in my car for roadside emergercies. I get it from there when I go for an evening walk. Sometimes it gets darker than I expect before I can return from my walk and the vest alone would make it easier for cars to see me, but then you just push a button on the vest, and the front and back of the vest have a strip accross them that light up very brightly! You can have constant on or flashing. To top it off, it comes in a great nylon bag to store it in and even comes with extra button batteries. This is a winner!