I have scoliosis and my chest wall is a lot more concave on the right side. When we put in the sizers we couldn't get them to look even. I was trying the Allergen style15 midrange. My doctor suggested trying a high profile (style 20) on the side that the chest wall goes in slightly and keeping the style 15 on my left. This looked much better to my husband, the doctor and nurse who were all in the room. Of course I'm hesitant going with one high profile and one moderate profile and so would love any feedback if you have it.