@pnpam75 and @orsons - Sorry about the abbreviation. AFO - ankle foot orthotics. I have drop foot with peripheral neuropathy and tripped a few times. Was fitted with these orthotics which keep the foot from dropping down and tripping. It fits inside my sneaks and a strap goes around the lower leg and keeps my ankle at about a 90-degree angle so the foot can't get "caught" and then trip. These also improved my balance by more than 70%. Prescription was needed and issued by my primary doctor. Then went to a company that specializes in the fitting and sale of such items.