You imprint by walking in them for a few days.! Your body weight imprints in the footbed by using them. No one else should use them or that imprint of weight distribution will change to them!. You should feel your posture self correct nearly immediately as the shoe bed throws you into alignment and your rounded posture straightens right up. It has a wobble board….round disc that you see in the heel on the bottom, and that wobble board keeps you from tipping from left to right. And it actually does! The depth of the Fit Flop sole, and NOT the thin soles which they have, but the dense deep bottoms of the originals, act like shock absorbers for your entire body! I just walked a mile on concrete and don’t even feel it because of the effect of the shoe’s bottom! I hope that helps! I just told my pharmacist as he asked how I had such great posture…..it’s the shoes!…..the mens shoes are equally amazing! My husband was supposed to have a spinal fusion, but I begged him to get mens FitFlop shoes first. That was 10+ years ago and he never had to have the surgery and he doesn’t get out of bed without them on either!…..neither do I! Slippers boots clops you name it…..they all come from Fit Flop! Never seem to wear out either and just enjoy them ! They are truly game changers in life!