I have really flat feet and as you know the arch on birks is vey aggressive. so it just rubs on my foot super hard. If I know I'll be walking far I'll put athle

I have really flat feet and as you know the arch on birks is vey aggressive. so it just rubs on my foot super hard. If I know I'll be walking far I'll put athletic tape on my non-arch or else a blister will form. Now I have visible calluses build up, but I persist... :(