Lasting for up to 4 months' use, this award-winning eyebrow serum is made up of RevitaLash's proprietary blend featuring a scientifically-advanced technology. Original, physician-developed eyebrow conditioner addresses the visible signs of eyebrow ageing due to chemical and environmental stressors, over-plucking and styling products, leading to healthier-looking, more luxurious brows. 9 x Allure Best of Beauty Winner.