From the manufacturer: Bring the heat – but keep hair safe with this lightweight serum that protects hair from thermal styling and blow drying. Benefits: Cyclopentasiloxane – a heat protective agent that seals hair against moisture loss without weighing it down .Free of sulfates, parabens, phthalates, preservatives, gluten, mineral oil, sodium chloride, petrochemicals and artificial colors. Vegan and cruelty-free. Safe for color-treated, Brazilian-treated and keratin-treated hair. I've closed my salon and selling off some remaining items. This is a brand new item in its original box.