I ordered this item as it can be used with all of my existing tops and so saves me a lot of money that I would have spent on breastfeeding tops. Just slip it on under your normal top and it covers your stomach when you lift your top up to breastfeed. The sizing is accurate, however after a few days of use, it loosens a bit and starts to ride down somewhat. Still, a great product and use it every day. Keeps you nice and warm, too.