Revolutionary performance to rack up the miles with a smile We've launched the ninth version of our award-winning Clifton line, lighter and more cushioned than ever. By eliminating weight and adding 3mm of sole height, the new Clifton 9 offers revitalizing sensations at the bottom of the foot with a new responsive foam and an improved sole design. Stripped of reinforcements and fusible elements, the streamlined upper was created using environmentally conscious methods and features a softer heel, a reflective panel on the heel and a streamlined tongue with gusset on the medial side.