This ThermaShape Hot Flex spray is a medium hold prep spray for heat styling. It is ideal for curl creation, especially in straight hair and creates defined hot iron curls. To use: Spray into towel-dried hair, blow-dry and shape with hot tools. TRIfinity Technology ensures you’ll get the most out of START, STYLE and FINISH, so you can create an infinite number of style equations. All KMS products are multi-compatible. They work best when used as a 3-step regimen together, and each step benefits the end style.