what is the shield anti-humidity spray? a lightweight, invisible heat protecting and style extending spray that is clinically proven to protect hair against frizz + humidity for 24+ hours. who it's for all hair is welcome! made especially for those who want to protect locks against heat, frizz + humidity. why it's special muggy weather has got nothin’ on us… shield your strands from heat + humidity while keeping your style looking smooth all day long. protects hair from heat styling- 450° f/ 230°c heat* to be exact. the shield also blocks strands from pesky, sticky humidity. contains uv filters - famous for its protecting benefits that can prevent damage caused by sun exposure. maintains frizz-free styles - hairstyles are clinically proven to last for 24 hours* with no frizz in sight. *clinically tested for heat and humidity protection.