The Asics Gel 3000 is a brand new model that's designed to fall between the massively popular Kayano and 2100-series. By supporting the forefoot through the final stages of the stride the Gel 3000 puts the foot in a more efficient position during the propulsion phase to minimize energy loss and further inhibit over-pronation. It also has a memory-foam lined heel with two layers of foam that mould to the heel for a snug, comfortable fit.