The paper is very thin and has no foil lining. The greeting card can actually be seen through the paper. Greeting cards should have a more substantial envelope.
Because I am rapidly aging and do not drive anymore I sent my daughter to pick up mailing envelopes for my Christmas greeting. When I opened the boxes to use them I was DELIGHTED that I did not have to moisten the flap but simply peel the paper to make it stick! KUDOS to STAPLES that has served me well for over 50 years! Thank you MERRY CHRISTMAS and HAPPY NEW YEAR!