Beverly Hills MD Firm + Balance Mineral Mask 1.69 fl oz/50 ml New in box. Factory sealed. Applicator brush included. Beverly Hills MD Firm + Balance Mineral Mask is a mineral-rich clay mask designed to firm, tighten, revitalize skin’s appearance with just 2-3 uses a week. Its nutrient-rich formula makes an incredible addition to any skincare routine — to help you achieve your brightest, most youthful-looking skin possible.