FitVille Comfort+™ technology puts comfort in motion. This advance technology follows the contour of your feet to enhance your movement. With Comfort+™, EVA materials transform into our dual density solid soles.The state change from just EVA material into a dual density sole is like a caterpillar turning into a butterfly. It’s not only magic, but also scientifically proven. Our extra cushioning shoes delivers a greater extent of comfort-in-motion.