UPGRADED PREMIUM RUBBERThe inner curling rod is upgraded to premium rubber material, which is more flexible and stretchable compared with old stiff foam version.The curling rod is non-deformable with no folding crease no matter how you fold it. It is softer and more comfortable to sleep in.^ HEATLESSThe heatless hair curler is designed to create a gentle way of curling your hair. It's a revolutionary tool to curl your hair without putting heat in it. It helps you to get amazing effortless nature curls everyday ^ ZERO DAMAGEThe heatless curler brings ZERO damage to your hair compared with traditional curling iron. The luxurious smooth fabric can help keep your hair free from tangles and split ends.^ CONVENIENT & TIME-SAVINGThe no heat hair curlers you can sleep in overnight is convenient to use at home and portable to be carried out. You will have beautiful hairstyles every day without spending extra time in the morning.^ HOW TO USEBefore going to the bed, put the heatless curling rod headband over your head, clip it at the top and then braid dry or slightly damp hair around the curling rod and secure it with a scrunchy on the bottom. You will have beautiful curly hair in the next morning, and this sleep styler will not cause any discomfort when sleeping.