And this thing ROCKS!
The first one was pretty crude, being little more than a curved piece of hi-strength fiberglass laminate bolted to the back of a regular fiberglass and plastic leg sleeve. It wasn't adjustable for height or camber or anything, but my prosthetist is good and he got it chose enough to perfect on the first try that eventually I was able to run the Army Ten-Miler with it.
Sadly, I never really got this one working right. There was always a spot inside where I'd get pain during a run, and we were never able to solve that problem despite cutting out large sections of the hard plastic. But after a second bit of leg surgery, this one didn't fit right anymore either so it joined the first one in a box of cast-off legs in the basement.
Enter the third one. This one is cutting-edge technology. It's fully adjustable in all directions and for height and it has a removable/replaceable sole make by Nike. It's also made of a new material and it's easily half the weight of the last one. This thing is cool beyond description.
A nice promotional video put out by the Ossur folks:
Sadly--but good for me and others--the advances in technology on these legs over the last decade has been greater than at any other time in the history of prosthetics, and it's all courtesy military spending due to the large numbers of amputees coming back from Iraq and Afghanistan. Most of what I use today on all of my legs wouldn't even exist but for that.