These bed mats are great for anyone co-sleeping with a new baby who is prone to leak bodily fluids at night. When a diaper leaks in the middle of the night or baby throws up, you don't have to change the sheets. Simply rip off the bed mat and go back to sleep. Also great for new mothers who wake up in a puddle of milk at night. . . The cost is a bit high, but a diapered baby doesn't leak every night, so a package lasts me a couple months.