Product Overview Soften and nourish your hair with the leave-in bu-phase oil mist Soleil Huile Sirene Treatment from Kérastase. Packed full of Babassu Oil this spray will instantly soften the feel of hair, protect from sun, chlorine and salt water whilst enhancing natural curls and texture. Directions for use: Shake well to mix the two-part formula. Spray onto the hair, leave in and style.