"The Sex Lives of College Girls"'s Costume Designer Breaks Down Each Character's Look

While Whitney's life previously revolved around soccer, she's now getting the chance to explore her academic and romantic interests. That preppy playfulness shows in her looks this season, though she hasn't ditched her relaxed athleisure. "There's a smoothness to her style," Mellow says.

As Whitney becomes passionate about her biochemistry class (and bio bro), she adds more collegiate sweaters and structured silhouettes to her closet. The soccer star's clothes come from stores like Aritzia, Nike, House of CB, and Urban Outfitters.