Hot Sexy Prep Me Heat Protection Blow Dry Primer is a weightless primer that provides up to 68% reduction in breakage when applied prior to blow drying. It is formulated with Amphomer, a special ingredient that provides heat protection up to 450F. It leaves no product feel and can be layered with other products. Features: Protects up to 450F. Reduces breakage by up to 68%. No product feel, ideal for layering with other styling products.