There is nothing worse than having a sick child. Brolly Sheets will come in handy when your child is unwell. You can place them over the pillow so if they vomit in the night - your mattress is protected and its a breeze at 2am to clean up.
If, like my children, during the day when they are unwell they like to lie on the couch and watch TV. Brolly Sheets are also great to lay over the couch so if your child doesn't reach for the bowl in time......
If you have a child ill in bed for long periods at a time, by whipping off the Brolly Sheet each couple of days, it really freshens up the bed without the need to completely strip it.