Winters are long where I live and the cold, dry air wreaks havoc on my scalp to the point that it's itchy and painfully dry within hours of conditioning. I've tried many expensive and salon brands from deep conditioners, hair oils, and masks without relief. I was relieved to see this sample in my Birchbox, something I hadn't tried yet, but at the same time dubious by now that anything would give me results. I shampoo and then put this product in to sit while I shave and exfoliate my face, just enough time for it to sit in the shower, then rinse. (Use care to use the pads of your fingertips to massage hair products in and not your nails, and avoid the water being too hot especially when rinsing.) My scalp has remained soothed and calm, itchy pain relieved finally! The sample was a very nice amount to try out over multiple washes for my shoulder-length hair. It's nice to get a sample size that really gives you enough product to see if it gives beneficial results. I'm using it with Creme de Coco shampoo by Bumble and Bumble but am going to try the full Briogeo hair line, I'm so pleased.