111Skin NAC Y2 Recovery Mask in Beauty: NA. 111Skin NAC Y2 Recovery Mask in Beauty: NA. Featuring a trifecta of barrier-building complexes, the NAC Y2 Recovery Mask works to help reduce oxidative stress, irritation and redness while strengthening the skin against all external aggressors. This leave-on mask features 111Skin's signature NAC Y2 Complex, a fusion of three ingredients that all improve antioxidant levels, providing the optimum environment for collagen and elastin production and reducing the effects of environmental damage.. Suitable for normal skin. Targets concerns of skin stress, irritation, and redness. Cruelty-free. 2.54 fl oz/ 75 ml. Apply a generous amount onto clean skin or focus on areas of concern. Leave on (do not rinse) and follow with your usual 111SKIN routine. Use 2 -3 times a week. 111R-WU77. RECMSK75. Working in collaboration with space scientists responsible for the well-being of astronauts, renowned cosmetic surgeon Dr. Yannis Alexandrides developed the patented NAC Y2 formula that runs through the core of his highly effective skincare line. Named after his Harley Street, London clinic, 111SKIN's cutting-edge products feature potent healing ingredients designed to promote a youthful and radiant appearance while offering unprecedented protection against environmental damage.