Improved heat-resistant curls: the improved curling iron headband is made of satin material on the outside and soft material inside, which is much softer and more comfortable to sleep on than the old version and has no chemical smell Hair rollers without heat: the heat-resistant curler offers you a new way to curl your hair to get beautiful, bouncy curls without damaging your hair by heat Damage-free curlers: sufficiently long curlers can be firmly fixed and are perfect for thick, thin, curly or straight hair. The rounded edges and smooth surface will not pull or damage your hair Easy to use: place the curling iron over your head like a headband. You can attach it at the top or attach one side with a hair tie like a ponytail. Then wrap dry hair around the other side of the curling band and attach it at the bottom with a hair tie. Make sure you tighten the wrap tightly and start near your head Sleep curlers are not suitable for girls with short and thinning hair