I love this product.  I have a Medela Pump in Style Advanced, and I was unsure how I would realistically double pump without being hands-free. This product solved my problems.  It expands to any size and is VERY comfortable.  It is so easy to put on and take off at work for pumping three times a day.  Also.. I wash it in Dreft, so it reminds me of my little one while I'm away.  :)  Great product!