http://www.articleheaven.net en-us editorial@articlealley.com The main purpose of the double window envelope is to show the address of the recipient on one window and the other is for the return address. Though there are many kinds of envelopes now days to enclose letters for some matters, double window envelopes ar... http://www.articleheaven.net/are-vellum-envelopes-better-than-double-window-envelopes-1534571.html 06th May 2010