IOPE Vitamin C Expert 40% Mask Concentrate 15gThis is an ultra high concentration brightening mask featuring 40% Pure Vitamin C to provide an instant radiance boost and skin texture refinement. Designed as a professional grade "flash treatment," it effectively removes dead skin cells and targets stubborn dullness, leaving the complexion remarkably bright and smooth in a single use. The formula is stabilized with IOPE's specialized technology to ensure maximum potency while minimizing oxidation.