Our walking apparatus works like a sophisticated clockwork of joints, pendulums and springs. Countless muscles help us to walk purposefully from A to B and back again. Hours of walking and standing on hard floors can strain muscles and joints over time. Good cushioning like in the IAN XXTP red Mid ESD S2 prevents this. BASF's high-tech Infinergy® material in the sole core works wonders, as the white, interwoven particles first yield as you walk, but then rebound, so that some of the kinetic energy is virtually