They say, “You don’t know what you've got ‘til it’s gone” and that absolutely applies to this bonding oil from Olaplex. I use this after I wash my hair and if I forget I notice an ENORMOUS difference—my hair will feel dry like straw and doesn’t hold a curl. When I do use this oil, it adds shine, controls frizz and offers UV and heat protection. Worth every penny, even when it’s not on major sale but right now you can get it 30% off!!