This is a sheet designed to be used under a mattress pad. It has wide elastic bands on all four corners to secure it to the futon. I bought this to protect against my child's nighttime vomiting. However, by the time the product arrived, my child had been diagnosed and treated for postnasal drip, which was cured. I used the sheet 2-3 times, but it didn't "come into play." It has been home-laundered, but when folding it, I found some of my child's short hairs stuck in the fabric, which I removed. There might be more, so I've marked it as "slightly damaged or dirty." I hope that those who are not bothered by minor details and are easygoing will consider purchasing this. I look forward to your purchase if you understand that this is a used item. #WaterproofSheet #BedwettingSheet #Baby #Kids #Caregiving #Pets