Elizavecca Milky Piggy Vitamin C 21% Ample Mask is a great at home vitamin c face mask. The mask helps improve dull, uneven skin texture and tone. I use the mask three times a week before I apply my makeup. I leave it on for 20 minutes then rinse it off. It leaves my skin super soft and helps my makeup application go on seamlessly. The mask does have a little warm effect when applied, but it’s not burning. This mask has worked great with my sensitive skin.