I've seen a lot of posts about how thin the Vistaprint envelopes are. Some posts suggested an upgrade to better envelopes, but after much googling as well as searching on the VP site, I couldn't figure out how to do that. So once again I turned to an online chat with VP customer service.
Me: Are the "matching envelopes" a heavier weight than the "plain white envelopes" that come free with my order?
VP: The Matching Envelopes are actually the same weight as the Plain White Envelopes, the only difference is that one can be customized to add texts or a design and the other cannot.
Me: Is there a heavier weight envelope that I can order on the site?
VP: I am sorry, but all the Envelopes we offer are made from 70lb acid free stock.
There you have it, a conclusive answer.