You might be wondering if you can curl Remy hair. Yes, you can curl Remy hair! Just as you would do with your natural hair, you can also heat style your Remy hair extensions. Remy hair can handle a flat iron, a heat blow dryer, and any other styling tool. Keep in mind that your hair extensions can damage just like your own tresses, so ensure that you always spray a heat protectant over the curls before introducing a hot curling iron to the hair.