Asics present the 31st version of their ultimate cushioning and supportive road running shoe - the Kayano. This version has an improved heel collar thanks to the Knitt collar construction which holds your heel better, in turn providing more security for your entire foot. It also provides superior cushioning. Asics Gel Kayano 31 keeps the best from its predecessor; premium midsole with 4D Guidance System and supper soft, breathable upper, making it the ultimate in supportive cushioning.