The number one product facebymace can’t live without! Duality contains two chambers. One chamber contains an all-trans retinol which is non irritating. Retinol is great for aging, fine lines and wrinkles, and texture. The second chamber contains benzoyl peroxide, the number one FDA approved ingredient for acne. Benzoyl peroxide oxygenates the pores and clears the follicle. It is phenomenal for inflamed acne especially. You do one pump of each chamber, mix in your hands, and apply, avoiding eyes and neck! I call this my acne graveyard product. “Acne takes a trip to acne graveyard when duality is in the picture!”