[applause] >> dr. allen, what about all these cushions and inserts we've been putting in our shoes for years? >> well, a lot of people buy these things and they do they shock absorb very well. >> all right, well, what about this gel thing? it's very popular. >> well, better, and that's why our new walkfit orthotic has a gel heel for added cushioning. but by themselves, where's the support and stability and how do they help with...? >> alignment... >> both: alignment, alignment. >> alignment and stability. and don't forget, we have holes in the walkfit to keep your feet cool all the time. >> o.k., now, doc, tell us exactly what's happening down there with our feet and why everyone should wear walkfit. >> o.k., let's go take a look at the skeletal muscles again. now, as i've said before are 26 bones in the foot and they all must work in harmony. when you walk, the foot collapses and the bones can go out of alignment. not only can that result in hip, knee and back pain but it can lead to hammertoes, corns and c