My husband needed for his walks with our dogs, which often take place at dusk and at night, a safety vest, which he may carry over jacket or coat. That's why I ordered them much larger than its standard size. The jacket is very thin, therefore easily attract and fit over the thickest coat. And the reflective strips do their job. So far, it is in spite of the thin material and the almost daily use for several months in perfect condition. We would buy them again at any time.