Not for fine or thin hair [SEP] The clip provided barley fits around the curler itself so there's nothing to hold the curler to your head, prepare for a battle. My hair is also too short for this (it sits just at my color bone), I'd say you'd easily need hair to your mid back for any chance of this working. Also, this curler is made of thick foam, I don't see it being comfortable to sleep with. Maybe if the foam broke down a little as time went on? Overall I would not recommend. Use a robe wrap and save yourself the frustration.