Barbara Tfank doesn't do trends. The Los Angeles-based designer aims to create "timeless" dresses that a mother will pass down to her daughter one day or, even better, dresses that both a mother and daughter could wear in the same week to different events. Tfank's "jewel box" collection for Resort featured classic silhouettes cut from expensive French taffeta, which the designer favors because "it's beautiful fabric that changes with the lighting." A full, tea-length skirt with a shot of sparkle paired with a simple knit T-shirt looked tailor-made for Mad Men's Betty Draper, but like it or not, Tfank may end up trendy. Michelle Obama recently wore one of her designs to Buckingham Palace to meet the Queen.