- up to 230O c heat protection instrumental test, protecting from heat tools up to 230O c. Tired of rebellious hair feeling unmanageable and out of control does the stress of straightening or smoothing frizzy hair make your hair the enemy frizz can make hair look shorter and messier. Dream sleeker with frizz resistant hair. Introducing the frizz killer serum. A lightweight serum with up to 230O c heat protection, all day anti-Frizz and that slays static.