The Y Theorem Bio Cellulose Facial Mask is a healing treatment to repair, rest and rejuvenate your skin. Designed to soothe, support and strengthen stressed skin, 111Skin's reformulated mask is infused with complexes that are inspired from wound-healing processes. The superior bio-cellulose body, initially used to treat burn victims, acts as a second skin that encourages superior penetration of ingredients. Alongside a blend of botanical and synthetic actives, the mask works to support a plumper, brighter and calmer appearance within the complexion. N-Acetyl Cysteine (NAC) is a skin conditioning ingredient that supplies bioavailable cysteine for glutathione (a tripeptide antioxidant) replenishment. NAC also prevents oxidative damage and inflammation as well as playing a vital role within repair processes of the skin, providing an optimum environment for collagen and elastin production..Suitable for normal skin Targets concerns of fine lines and wrinkles.Biodegradable & cruelty-free.Free of Sulfates and Paraffin.5 masks x 0.78 fl oz/ 23 ml.Apply middle Bio Cellulose layer to clean, dry skin.Wear for 20 minutes.Use up to three times per week, and for longer durations when extra hydration is needed