I have a few different kits from Adventure Medical. They put together some really good pre-arranged kits that still have room for additional supplies if you want. I have a small one that I always carry and each vehicle is equipped with one. I try to make sure that medicines are swapped out once per year. I have one of their water tight versions that I keep on my kayak.
Their website lists all the contents of the various kits. I have found that useful in making the decision about everything I would ideally want in a comprehensive kit.
Their website lists all the contents of the various kits. I have found that useful in making the decision about everything I would ideally want in a comprehensive kit.