Reflector vests

The year we went to Africa to count elephants for Earthwatch they told us that we had to be able to walk two miles a day. It was summer time and hot in Kansas so we liked to walk at night. We bought two vest that reflected light so cars would not hit us while we were walking. I watched the news the other night and they have tail lights you can put in your back pocket to do that. I wonder where those vests are now?