No problem, AFO stands for Ankle Foot Orthotic, it basically a leg brace. The one I will be fitted for has an insole made for my foot and a stiff rigid leather lace up/velcro ankle foot support that will fit inside a walking shoe. I will need to get a shoe slightly larger to accomodate it and take the insole out. It has a brace that fastens to my lower leg so that leg bone provides the support that the muscles in my ankle and foot no longer provide. Currently my doctor has me in a boot/cast until it is made. It is the only thing that prevents me from walking on the outside of my foot or prevents me from rolling my ankle or worse. It also keeps the foot at a 90 degree angle so that I am not tripping over my toes.