Do you ever have early morning appointments and wish you had time to go to the hairdresser first? Don't worry, your hair will look great with these special overnight curlers. Sponge curlers won't hurt your head when you lie on them. Simply roll up wet hair and close roller with plastic clip before going to bed. The sponge will absorb the humidity so your hair will be dry and ready to brush out in the morning! 3 diameters. Different colour to distinguish sizes easily. Blue: diameter approx. 15 mm. Yellow: diameter approx. 20 mm. Green: diameter approx. 25 mm. Sponge: polyester polyol/Polypropylene.