K18 HeatBounce is a salon-essential heat protectant that goes beyond surface-level defense. Powered by Resilicore™ Heat-Shielding Technology, this weightless conditioning heat protectant formula defends hair from heat up to 450°F (232°C) degrees from the inside out, mechanical and UV environmental damage—while locking in moisture for smooth, healthy, vibrant results. Ideal for all hair types and essential for daily use behind the chair