streax professional canvoline hair serum is mineral oil free lightweight serum, specially formulated to help give chemically straightened or sensitized hair a soft, sleek finish by locking in moisture and enhancing shine. enriched with nutrient-rich baobab oil and nourishing vitamin e, this hair serum helps provide instant softness and sheen, to give straightened hair a smooth and lustrous look. straight, strong, smooth hair, just like on day 1!