After just one look, it’s hard not to covet Michelle Obama’s toned arms. It’s one of her best features and she knows how to show them off. The sleeveless sheath dress has become the First Lady’s style staple, and when in casual mode or relaxing on vacation, embellished tanks are yet another way for her to put her fit fins on display. We can all use a little encouragement, so here’s a look at Michelle Obama’s sleeveless style.