?EXCELLENT Service?- Sleep curlers are not suitable for girls with short hair and thinning hair. If you are not 100% satisfied, or there is any problem with the curling iron, please contact us directly, we provide 365 days warranty, replacement and refund services. ?Easy to Use?Put the curling rod over your head like a headband, you can clip it at the top or secure one side with a scrunchie like a ponytail, and then wind dry hair around the other side of the curling ribbon and secure with a scrunchie on the bottom. Make sure to wind tightly and start near the top of your head. Can leave in for an hour or two in the daytime with overnight with dry hair. ?No Damage Silk Curlers?Hair rollers that are long enough can be tightly fixed and are perfect for thick, thin, curly, or straight hair. The rounded edges and smooth surface will not pull or damage your hair. ?No Heat Curlers?Heatless curler is to give you a new way of curling your hair created to get beautiful bouncy curls without damaging your hair with heat. ?Upgrade Heatless Curls?Upgraded curling rod headband is made of satin material outside and soft material inside, which is much softer, and more comfortable to sleep in than the old version, help you to stay in place, hold your hair tightly and no chemical smell.