Following advice gleaned from the plethora of experience on this site I purchased one pair of SOLE standard footbeds. Within one ruck march my arch pain is subsiding. That was enough for me to purchase three more sets of Ultras (I've used Dr. Scholl since I was 16 and in recent years they had begun to fail me) as I need a bit more support than normal (ortho orders). Of course you will have to test out what works best for you pbr, but I was hooked on the first try.