Jules' success stems from his mastery of the art of formulation and his deep understanding of what products really sell. The so called "Holy Trinity" of product formulation - Instantaneous Effects, All Day Effects and Long-Term Effects - informs all of Jules' work and has driven product philosophy at large corporate beauty companies such as Avon, Elizabeth Arden and Estée Lauder. 

Products that carefully balance a mix of art and science experience higher repeat purchase rates and customer loyalty than products that do not. Over the years, at a number of large corporations, Jules' skincare creations have clearly demonstrated this principle, grossing billions of dollars at retail and continuing to be top-selling products decades after they were first released.