Loose, bouncy curls add instant volume, style, and glamour to any look. But constantly using heat tools like curling irons and straighteners can lead to dryness, breakage, and long-term hair damage.

If I had a dollar for every hour I’ve spent blow-drying my hair, I could easily retire at the age of 25. But here’s a revolutionary thought: You can actually get great curly hair overnight while you ...