Eveline Cosmetics 5-in-1 SOS Lash Booster Multi-Functional Lash Serum is an innovative product that combines the properties of a rebuilding serum, a hair growth activator and a mascara base. How does SOS Lash Booster Lash Serum work? An innovative formula, rich in advanced active ingredients that work in synergy with argan oil, nourishes, regenerates, thickens and densifies the eyelashes :The bioHyaluron complex penetrates the structure of the eyelashes, hydrates them, smoothes them and stimulates their growth,The Luxury of Youth complex regenerates, nourishes and strengthens the eyelashes, in addition, rebuilds and protects the hair fibers against external factors,panthenol penetrates deep into the eyelashes and strengthens them from root to tip, moisturizes, smoothes and thickens the capillary fiber and gives shine to eyelashes.