From the treadmill to the outdoor track, the Asics Women's Narrow Gel Nimbus 16 Running Shoe provides a smoothly neutral transition with its plush FluidRide midsole. Crafted specifically for women with narrow feet, the Asics' FluidRide midsole provides 20% more bounce back and 15% less weight than any previous Asics midsoles. FluidFit stretch mesh gives you plenty of airflow while conforming to the shape for your foot for an ideal fit. Asics added an antimicrobial ComforDry sockliner which reduces odor, wicks moisture, and dries quickly. The shoe also features an Impact Guidance System that enhances your natural heel strike to toe off, and the Guidance Trusstic System utilizes a vertical flex groove called the Guidance Line to ensure an efficient gait while still providing a well structured midfoot. Gel Cushioning Systems at the rearfoot and forefoot reduce shock, and the DuraSponge sole is a blown out version of Asics High Abrasion Rubber for more comfort. Asics even minimized the eyelets to provide a more finely tuned fit.