Asics calls the Gel-Kayano 13 a revolutionary running shoe and we tend to agree. It will give you Gel Cushioning System the featherweight Solyte midsole a Biomorphic Fit upper and other great features to keep you moving in comfort.Synthetic and mesh upper with Biomorphic Fit for enhanced fit and decreased potential for irritationImpact Guidance System uses linked componentry to encourage optimal gaitDuoMax Support System Space Trusstic System