"Heatless curls are curls created without heat, using techniques that include braiding, rollers, pin curls, overnight waves, and finger coiling," explains celebrity hairstylist Becca Mader.

and secure it with a pin. Keep the rollers in for at least 3-4 hours. Adds some volume but doesn't create strong curls. The longer you keep the rollers in, the better the volume and curl definition.