Sunday Riley's Saturn Sulfur Acne Treatment Mask is a potent acne-fighting formula that helps to clear blemishes while preventing new ones from forming. Infused with 10% sulfur as well as nourishing ingredients such as tea tree oil and manuka oil, this effective mask helps to clear the complexion without over-drying the skin. Use: Cleanse skin thoroughly before applying. Leave on until dry (20 to 30 minutes depending on desired application amount), then remove with water. This mask may also be used as a spot treatment to target specific concerns or as an overnight treatment for maximum anti-acne support. Sulfur: dries and clears up acne while preventing new blemishes from forming. Niacinamide: promotes clear skin while boosting skin's healthy-looking radiance. Zinc PCA and bentonite clay: help to clear impurities, reduce excess oil, and soothe the appearance of surface redness without over-drying. Tea tree oil and manuka oil: purify the skin for a smooth and clear complexion after each use. Dipotassium Glycyrrhizate: reduces the appearance of acne-related surface redness. Formulated without parabens, sulfates, gluten, soy, phthalates, or fragrance. Cruelty-free. Vegan-friendly. 2 fl oz/60ml. Sunday Riley Women's Saturn Sulfur Acne Treatment Mask 60ml A great designer gift. Shop Sunday Riley at Barneys New York.