Review (4/5): These DO slip, be warned
I read the reviews and purchased these anyway because they were so cheap. They do slip on your head, and not stay in place. I like the colors and the seams on the one side of the headband help it try to stay in place. I have white people hair, especially if it's unwashed, like greasy these headbands will slip! It's possible more textured hair might help them stay in place. You do need to stretch them a bit when you first start using them, but after that they're good. I still use mine.