Dark Oil by Sebastian Professionals are lightweight care and styling products that replenish the hair from the inside out. Suitable for all hair types the Dark Oil Lightweight Conditioner is infused with a special blend of oils like jojoba and argan oil that smoothen and detangle the hair keeping it lightweight and full of body. Use as part of the Dark Oil hair care regimen along with the shampoo and hair mask for up to 3 times smoother hair* that smells beautiful. *Shampoo mask and Dark Oil vs non-conditioning shampoo.