You learn something new each day. I was at Walmart over lunch. In with the seasonal coolers/beach gear, they had peel away fitted sheets. Who knew. I can see if you have a pet that sheds a lot, they might be handy. Perhaps if you boondocked for extended periods and didn't have access to a washing machine you'd like them. Anyway, I never knew such a thing existed until today. But, when I googled the term, they are sold by a number of retailers. Interesting.