Stassi Schroeder is very much in favor of the outfit of the day concept. In fact, she's so obsessed with the whole #OOTD phenomenon, she founded a national holiday in its honor. (Watch the video above to learn more about that.) However, the Vanderpump Rules fashion-lover isn't only about the flavor of the day in fashion. She can also appreciate a classic staple. 

On October 22, Stassi took to Instagram to show off one such look from her own wardrobe. Wearing a flowing, pleated gown in a deep purple hue, the SURver carried a fringed purse and wore an eye-catching cocktail ring. She pulled her hair back into a loose chignon, and posed prettily for the camera amid the lush greenery in Los Cabos. 

"That one dress you've had for 10 years and still doesn't get old," Stassi wrote in her caption. 

We're with Stassi on this one: That dress will never go out of style.