You don’t have to braid your hair into a pair of socks (thanks, TikTok) to achieve heatless waves, like @yolaue on Instagram here. If you have straight hair, there are plenty of different ways to create heatless waves, said Sato, and the simplest way is to braid your hair when it’s damp. “Sleep in it overnight so that it dries to create a subtle wave,” said Sato. “You can alter the pattern of the wave by changing the type of braid you do. For example, a smaller, thinner braid will create a tighter wave. A thicker or loosely-woven braid will create a looser, more subtle wave.” Just ensure your hair is around 70% dry before going to sleep so as not to wake up with wet hair.