Compared to the GT 2000, the Dynaflyte 2 is still a baby. As the name suggests, the Dynaflyte has a FlyteFoam sole. In fact, the Dynaflyte was the first model to incorporate Asics’s new midsole foam, and it’s a perfect approach to cushioning for shoe that needs to be light, responsive, and fast for uptempo training. While runners on the stability side have the legendary DS Trainer from Asics, those of us on the neutral side have the recently introduced Dynaflyte, and it’s turning out to be one of the best Asics for running fast.