Formula: This treatment has a milky white lotion consistency and is very lightweight. It leaves no sticky residue and absorbs quickly. You can add a small amount or increase the dosage and it will never weigh the hair down. The scent is fresh floral and lingers for a long time. I apply it to dry hair, comb it through and then go to sleep without washing it out. After shampooing in the morning I notice how much softer, frizz free and voluminous my curls are. I even like to add this to slightly damp hair after I shampoo, using it as a hair styling product to define my curls. It's fantastic! I love how much of a difference it really makes. The fill weight lasts for over a month if you use it weekly or a few times more than that. They really need to make a larger size bottle because when I'm not using it I feel my hair suffers. The lovely glass bottle is heavy and the pump dispenser works great until the product almost runs out. You can easily remove the top and shake it into your palms. The bottle can become slippery since it's glass so you'll have to be careful handling it. It's one of those accidental finds you make and then wonder how will you be able to live without it. I know. Dramatic. I recommend anyone with dry, dehydrated hair try Nuit night treatment.