Alterna Restructuring Bond Repair Leave In Heat Protection Spray is a lightweight, vitamin-enriched protectant that repairs and prevents heat and styling damage.Alterna Restructuring Bond Repair Leave In Heat Protection Spray is a vitamin-enriched treatment spray with Caviar Bond Enforcing Technology protects strands from heat while strengthening and smoothing hair. It creates a protective barrier, preventing breakage, split ends and frizz for hair that is soft, manageable and style-ready. Caviar Restructuring Bond Repair Leave-in Heat Protection Spray is clinically proven to help strengthen and shield hair while protecting hair from thermal damage up to 450 degrees and reducing breakage and split ends more than 99%.