Champion Window has been making vinyl windows, pure virgin vinyl PVC since the 1970's, beginning with aluminum windows in 1953, and Champion still makes the same quality vinyl window today.
Pure vinyl will last a life time. Other windows made with cheap filler additives such as wood pulp, clad or fiberglass is what has given "vinyl" a bad name. Bad vinyl will fade, shrink, warp and crack in the weather. Pure and more expensive to make vinyl windows by the Champion factory will last a lifetime.