Recognizing that every woman’s body is different, we worked with many women to design a product that would fit most women. The Fiera kit comes with two styles of SofSense rings, white and clear, allowing women to decide which style suits them best based on fit and comfort. The SofSense™ ring refills are available in two styles, for a custom fit. The clear SofSense ring is a deeper cup, and our most popular style. The white SofSense ring is a shallower cup. Your initial Fiera purchase comes with one of each style. You should try both and see which you prefer, and then order refills of that style. The SofSense rings are designed to be used for 3-5 uses each and should be replaced regularly for best performance.