This is a "Must Have" for a new Mom. It should be included in your hospital bag and readily available when you get home. I didnt know about this wonderful product with my first baby and suffered engorgement. :( I bought these at a great price and decided "why not" when I was expecting my second baby. I used these when I was engorged and it really help to relieve the discomfort, and helped to shorten the period of time it took for the swelling to go down. I used them cool after every feeding. Picture a round ice pack (that doubles as a heat pack) that has a big center cut out of it. That is what this is for the most part. I wish I had this sooner! This is really nice to have. I love the fact that they can go in the microwave or in the freezer. When microwaved it lasts around twenty minutes of heat.