Mendes previously joked that ladies should avoid the loungewear because it was the "number one cause of divorce".
The actress told Extra: "You can't do sweatpants... ladies, number one cause of divorce in America, sweatpants, no!"
Mendes has since written a humorous love letter to her favourite jogging bottoms, apologising for her words.
A photo posted by Eva Mendes (@evamendes) on
The image was captioned: "Dear favourite pair of sweatpants. I was just kidding when I said you're the #1 cause of divorce. Everyone knows that orange Crocs are the #1 cause of divorce.
"Either way it was a bad joke and feel terrible if you or anyone thought I was serious. Thanks for understanding sweatpants. Sorry orange Crocs."
The star's partner Ryan Gosling also got involved on Twitter, tweeting: "Word to the wise. Don't joke about sweatpants or North Korea. Real hot button issues. Trust me."
Obviously sweatpants thing was a joke. Wearing them now. That's right, tweeting in sweatpants. Rats! Said too much! You win again Twitter.
— Ryan Gosling (@RyanGosling) March 20, 2015
Word to the wise. Don't joke about sweatpants or North Korea. Real hot button issues. Trust me.
— Ryan Gosling (@RyanGosling) March 20, 2015
Mendes joined Instagram earlier this month, announcing her arrival by posting a cute snap of herself as a child.