I have flat feet. I don't know why I waited so long, but I bought a pair of arch inserts for my New Balance shoes and I can't believe the difference when I walk. No more hip pain...you know...those muscles at the top of the thighs! (I can actually feel the muscles in my calves and front thigh muscles working when I walk now. ) Only problem with my New Balance shoes is they are not very cushy and my feet get so hot in them. I absolutely love how cushiony my Crocs are, but I need more arch support than they give. I tried to put the insert in them, but of course they won't stay put. I tried the Crocs Reliefs, but they don't have enough arch support either. The inserts I bought for my NB shoes are 3/4 inserts. Maybe if I buy a full length insert, they wouldn't slide around, but I'll bet my Crocs will be too tight then. (Heavy sigh) There's got to be an answer. I would love to go to DL, just once, without my feet and hips killing me. Anyone got any ideas?