What it is: A leave-on lip mask clinically proven to help recover and repair the look of extra-dry lips overnight. What it does: It locks in hydration for a smooth, plump appearance. The dermatologist-developed lip treatment soothes skin and smoothes dry patches while you sleep—or whenever you need extra care—to help lips bounce back from daily damage. Its formula is infused with berry wax, shea butter and hyaluronic acid, which blanket lips in intense nourishment.Research results:In a clinical assessment on 30 subjects for four weeks:- It was clinically proven to reduce the look of fine lines around the lips by 26%- It was clinically proven to improve the look of dry lips overnightIn a clinical assessment on 20 subjects immediately after application:- It was clinically proven to instantly smooth lips by 65%- It was clinically proven to instantly plump the look of lips by 41%How to use: Apply a generous layer to clean lips before bed, or whenever they need rich nourishment and recovery. It can be used daily.