Brand new in box, 1.7 oz Dr. Brandt Hydro Biotic Recovery Sleeping Mask. Dr. Brandt's Hydro Biotic Recovery Sleeping Mask is powered by Dr. Brandt skincare's breakthrough biotic balancing complex that works to optimize the skin's eco-system by balancing naturally-occurring flora on the skin's surface while fortifying the skin barrier. It is powered by an oligosaccharide and yogurt powder that helps restore natural pH levels, a lactococcus ferment lysate that improves skin integrity.