Douxo S3 PYO Mousse is antiseptic and antifungal for the topical management of skin infections. This cleansing and hydrating mousse is a leave-on formula for longer-lasting action.. Douxo S3 PYO Mousse also contains OPHYTRIUM , a purified natural ingredient from the S3-Safe Skincare Selection. OPHYTRIUM has been carefully selected for its high tolerance and simultaneous threefold action on the skin s ecosystem. Helps support the skin s physical barrier for supple, hydrated skin. Helps support the microbial flora for healthy skin. Helps soothe irritated skin. The mousse can be used on the entire body or applied on small (localized) areas such as skin folds, paws, etc.