A must for Shirley Temple Curls [SEP] These foam and plastic curlers are a classic. They work best with wet or damp hair, slept in overnights, release the curls and style in the AM. It does take some practice becoming adapt at putting these curlers in on your own, but nothing a little time and patience can't handle. My daughter likes to put them in while watching a Netflix episode. Over time the foam curler does pack down, however these tend to last 3-4 years in our household.