Every six individuals in the United States will have one foot problem, while 36% of patients believe their feet have serious issues but do not see a doctor. Foot surgery costs $2 billion annually in the US, while improper footwear causes up to $15 billion in lost working hours. People walk about 110,000 kilometers on hard pavement over their lifetime, putting pressure on their feet equivalent to their weight or up to 3-4 times their weight when running. Wearing improperly fitting shoes is a main cause of foot disease, as 20 million people in the UK received treatment last year for injuries caused by improper footwear.