Packaging may appear different due to brand manufacturer update.What it is: Our Silk Essentials Thermal Strengthening Serum provides shine while sealing the cuticle and locking moisture into the hair when blow-drying, flat-ironing, or using curl and wands. So you don't have to deal with heat damage.What it does: Design Essentials Silk Essentials Thermal Strengthening Serum is a lightweight strengthening and smoothing serum that protects the hair from heat damage. Plus, it easily penetrates the cuticle and locks in moisture during heat styling, leaving hair shiny and full of body.What else you need to know: Improves hair manageability while imparting shine and a high-gloss finish; Gentle lightweight formula is perfect for all hair types (can be used wet or dry); Protects from damage during heat styling;