I have the red blue and green footbeds with the spesh shoes and shims. Ive tried all combinations of bed and shim and found that one shim with the blue or green bed works very well for me.

The footbads are for arch support, they dont actually shim your feet but come in the pack with some plastic shims to fit in the shoe as well. I would say that its worth trying the blue bed and seeing what effect the shims have for you, they might help. I find I am way more comfortable for trying them and they were well worth the cost. I also find the blue bed helpsd with overall comfort on both feet - i have one flat foot and one normal but both feel better with the blue bed. The green beds are probably a little bit over the top for most people without a real specific foot problem they are trying to correct.

They will also help keep your knees aligned but if ypou have no knee pain now then be very wary of how you feel when you fit them as you could solve your foot problem but create a knee problem in the process which is really not wht you want to do.