NWT Spanx Perfect Fitted Sheath Dress Designed using smoothing premium ponte  fabric, this dress is ultra-flattering, versatile and easy to dress up or down for any occasion, plus it’s machine-washable. Body skimming fit Wide straps cover bra straps Smoothing ponte fabrication Sheath silhouette Round neckline Sleeveless 4-way stretch fabric Easy zip yourself back closure Rayon/nylon/elastane Machine wash cold/line dry Knee length