CowCow Womens Organic Chemistry Formula Mathematics Sleeveless Dress, XS-5XL 90% Polyester / 10% Spandex Soft, stretchy, lightweight and quick dry fabric Machine Washable 5 Regular Sizes and 4 PLUS Sizes Available: XS (US0-2), S (US4-6), M (US8-10), L (US12-14) & XL (US16-18) | 2XL (US18-20), 3XL (US22-24), 4XL (US26-28) & 5XL (US30-32)