Monat Studio One Thermal Protection- Styling Shield High Heat Protection up to 450F Size: Full 4.5 fl oz. Formulated with THERMA-GUARD 450™ to reinforce and protect the outside of the hair fiber Provides high heat (450°F/ 232°C) and UV protection to prevent against damage and breakage Helps prevent moisture loss Natural silicone alternative improves slip to reduce friction while styling Lightweight formula, will not weigh hair down Non-sticky, non-tacky texture allows for a clean release from hands and styling tools.