Improved Heatless Curls. The improved curling iron headband is made of satin on the outside and soft material on the inside. It is much softer and more comfortable to sleep on than the old version, helping to keep your hair in place, firm, and free of chemical odors. Heatless Curling Irons. Heatless curlers offer you a new way to curl your hair, designed to achieve beautiful, bouncy curls without heat damage. Silk rollers that are gentle on your hair. The long rollers fit tightly and are perfect for thick, thin, curly, or straight hair. Their rounded edges and smooth surface won't pull or damage your hair. Easy to Use: Place the curling iron over your head like a headband; you can pin it on top or secure one side with an elastic band like a ponytail. Then, wrap your dry hair around the other side of the curling band and secure it with an elastic band at the bottom. Make sure to wrap it tightly and start near the crown. You can leave it on for one or two hours during the day and then dry your hair overnight.