Adjustable front closures let you slip in and custom fit at last without all the fumbling Comes in two flexible sizes (S/M, L/XL) and two colors (black, beige) to fit more bodies and styles. The lightweight,breathable fabric is machine- washable for quick cleaning The Hands-Free Pumping Bra works with Dr. Brown's Customflow and most other double and single electric breast pumps 94% nylon/6°% spandex.