What It Is A lightweight leave-in hair treatment that provides 25 benefits to hydrate, strengthen and prime hair. What It Does Moisturizing yet lightweight formula with fennel seed oil and sustainably-sourced coconut oil works miracles as an effective deep leave-in conditioner. Repairs the follicle and treats dryness to control frizz and create soft, manageable hair across all textures and hair styles whether it's coily, curly, wavy or straight.