Foot treatment mask. Advantages: Glycolic acid serves as a powerful agent for eliminating dry skin on your feet. It works by exfoliating, getting rid of dead skin cells while also adding hydration and moisture. Niacinamide, also known as vitamin B3, plays a role in enhancing the skin's defense system by promoting the production of ceramides. These ceramides are crucial for the skin's structure, aiding in the preservation of robust connections between cells, thus bolstering the skin's innate protective barrier. Vegan and cruelty-free certified.