Lavanila The Healthy Underarm Detox Mask Brush On Mask 1.5oz / 43g. A first to market solution for your underarm concerns. Environmental factors and sweatstopping formulas can leave buildup and often worrisome residue in the underarm that leads to lumps, bumps, irritation, concern, and a long transition to natural deodorant. This allnatural maskpowered by active charcoal, malic acid, and silicaworks like a magnet to help absorb and draw out buildup and impurities to detoxify, beautify, and transition the underarm.