I use Superfeet in my boots and some everyday light hiker shoes - I go with the green (average) but there are a variety of fits for different feet and comfort, I believe at REI where they sell them they have some sort of diagnosis machine device that helps you select what you need. While that's maybe a good thing (if you buy Superfeet anyway), nothing helps for sore feet like a visit to a foot doctor, followed by a qualified boot fitter. I've been getting boot advice from a guy at the Seattle REI flagship for about 25 years, whether I buy them there or not.