I lABSOLUTELY ove these rollers! I highly recommend them. They are great because they are already covered. I used to have to put wrapping paper on my other foam rollers - which meant re-rolling them nightly because I need the big ones and the papers do not stay on each day. I have been unable to find these rollers at my nearest Wal-Mart. I believe the oil in my hair causes them to decrease in size. I roll it daily so my rollers are used a lot. I like them big so that my hair curls loosely. I have thick, coarse black hair that is relaxed and these are great, but when they shrink in size my hair is too curly. So you may notice when it is time to get a new set. They are fantastic. Since they are foam they are the most comfortable to sleep in. The best investment ever, I wish I had invented them. They are definitely a blessing. Bless the inventor!