Lasted 6 months as a valet worker on pavement 40 hrs a week. these shoes made such a huge impact in my back and knee problem and foot soreness, all relieved. I tried asics running shoe neo 4 tech walker, theyre too hard - they have the asics frame and shape but no gel - pretty sure that was a hoax - the sole was too stiff. Kayana 21's are amazing - like an evening slipper - a gentlemans shoe - luxury of the foot - a must buy and try shoe