To choose between the single or double-side hernia belts would depend on if you have a hernia on only one side, or if you have hernias on both sides. If you have a hernia on one side, you should go with a single side hernia belt. If you have a hernia on both sides, you should go with a double side. We do have some customers who only have a hernia on one side but prefer to wear a double-side belt because they like the even feeling of it covering both sides, but it would be completely personal preference. If you have a large hernia with a lot of internal pressure, that seems like it would be hard to keep in using a belt, you would want to go with the HD (Heavy Duty) version. If your hernia is small and won't need much to keep it in place, the Minimalist would be better.  There are many other factors that play into which one you should choose, such as comfortableness, durability, etc. Click here to see a comparison page showing the two different versions and their attributes next to each other: https://comfort-truss.com/pages/comfort-truss-comparison/