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

Unlike the other girls, Kimberly never wears flashy or extravagant pieces. She has an all-American style to showcase her small-town background, so Mellow incorporates workwear, denim, natural fabrics, and neutral colors for the student's clothes. "When I use pops of color [for Kimberly], it's because she wants to be bold or she's trying to make a statement," she explains.

Kimberly's wardrobe consists of classic wrap dresses, plunging necklines, and fitted jeans from stores like BDG, Madewell, and Levi's, all of which reflect her flirtier personality this season. "We mix it up, because Kimberly's not perfect and she's more simple than the other girls," Mellow says.