- Discover elegance in every detail with VASTTO Sweater Dresses. Introducing the Women's Contrast Trim Flounce Sleeve Knot Detail Sweater Dress—a perfect fusion of style and sophistication. Elevate your look effortlessly with chic contrast trim, flounce sleeves, and a knot detail. Redefine your fashion statement with VASTTO's trendy Sweater Dresses designed for the modern woman.