People wear lots of activewear, like Lululemon's iconic yoga pants, to work — but di Giusto said this shouldn't be the standard.
"People misuse clothes when they go 'casual everything,'" di Giusto said, explaining that all clothes have a purpose.
Flip-flops, for example, are for the beach. Yoga pants, she adds, are for yoga.
"I promise you, 99% of those yoga pants never saw a yoga class," she said. "People tend to misuse clothes."