In a buttery blend of silk and viscose, the Calsi Dress—one of our co-founder Katherine’s favorites, which made its debut last spring—is our take on a ‘30s-style slip dress. It features ultra-skinny silk satin straps, bust darts for structure, and shirring at the bust for a subtle sweetheart neckline. A fitted waist gives way to an A-line skirt that falls to mid-calf, while petite ruffles adorn the neckline and hem.