The Doux Silent Hair Treatment 30-Day Humidity Shield - 2 fl oz - Silent Treatment 30Day Thermal Protectant Spray from The Press Play Thermal Styling System is a heat activated humidity shield that is infused with Keratin and a naturally derived strand coating technology that protects hair from frizz for up to 4 shampoos. This thermal protectant spray features Hydrolyzed Corn Starch, Keratin, and Humectant.