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. Ouidad Advanced Climate Control Heat & Humidity Gel - Stronger Hold helps transform uneven curl patterns into consistently formed, well-defined and frizz-free spirals. Anti-Frizz Nano Technology seals the cuticle to help lock in moisture and lock out humidity. A dedicated Uv filter helps protect against damage from environmental aggressors. The result: Defined, shiny, controlled curls in any climate.