I wanted a way to protect my bed during my period. Night time leaks happen no matter what I do, and I don't like my mattress stained. This is perfect. It's thin, and a good large size. I know lots of ladies that use a towel for this purpose, but this is better, as a towel is not water proof. Would also be very handy for babies' cribs, toddler beds, potty training, or adults with incontinence issues.