This is what Callie now wears to bed at night. I don't do it every night, but she wears it on the nights when I've just done her hair. It is supposed to protect her hair. A lot of moisture is pulled out of her hair at night by the cotton pillow cases. Why not get a silk pillowcase? Because I found this at Walmart for only, like, $3. That's why. And she loves it. It comes off by the morning, but the nights she does wear it, I can tell her hair is more conditioned in the morning.