PrimeRoller Material: Sponge + Plastic This Item You Can Design Your Own Hair Style By Yourself In Random At Home, And Never Ever Make Any Damage To Your Hair! The Best Gift for Girls and Ladies! Usage Methods Of These Roller Style Curlers: Slightly Wet Your Hair, Curl Your Hair, To Hold The Curler Firmer, Can Use With The Help Of Hair Pins. Blow Dry with Hair Dryer with Low/ Medium Heat. Easy To Use, You Should Just Keep 15-30 Minutes Or More Hair Curlers Are Made Of Sponge And Plastic Material Which Make You Feel Comfortable.