Oh, it stands for ankle-foot-orthotic. It's a brace I've worn on my left foot since about 2005. It was made from a plaster cast of my leg, so it closely matches the way my leg was shaped then. I have been able to tell from that that I have lost muscle mass.
It is a fairly lightweight plastic but I have also had them take pieces out of the back and bottom to make it breathe a little. I have also seen but not tried a 2-piece version articulated at the ankle, that has a spring pulling your foot back upward.
Mine straps on at the top with velcro, and the coverage is over the back of my leg and the bottom of my foot. I wear a little cotton tube-sock over the top just because I don't like the way plastic feels. It lives inside my shoe and I try to balance my leg length with undersoles. Maybe that's where I need to look at this thing. I'm just frustrated because, as Charlie Brown used to say, "Whaddya mean the wrong feet? These are my feet!"
"Try - Just A Little Bit Harder" - Janis Joplin
CCSVI procedure Albany Aug 2010
'MS' is over - if you want it
Patients sans/without patience