Humidity: It's every curl's nightmare. That's because curly hair's unique structure exposes its cuticle. When humidity gets in, curls expand with unwanted volume and look frizzy, undefined, and dull. Use Advanced Climate Control Heat & Humidity Gel to seal every strand, lock in moisture, and lockout humidity. Wheat Protein and pliable styling polymers form a weightless flexible lattice that expands as heat or humidity rises to hold curl definition without frizz.