Universal Standard Ambroeus Smocked Poplin Dress Black Plus Size M 18-20 This is one of the most flattering dresses I have ever worn! I'm sad it doesn't fit anymore and I have to give it up. seriously my favorite Universal Standard piece. This is the cocktail dress for those of US who don’t like cocktail dresses. It’s beautiful and elevated but still so easy. Made from our signature stretch poplin, this dress is refined and oh-so-comfortable. It features a shirred V-neckline, cap sleeves, and a smocked mid-section for a silhouette that sits close-to-the-body through the torso and has volume from the hips. 98% cotton, 2% elastane