The NOOSA TRI™ 13 shoes are built for triathletes, but they're not the only ones who can appreciate this model. With the addition of GUIDESOLE™ technology, this shoe just got lighter in weight and is now designed for a wide range of runners. The NOOSA TRI™ 13 shoe's GUIDESOLE™ technology is built around a philosophy that aims to lessen the overall load placed on lower limbs by implementing a curved sole design. These elements help increase running efficiency by reducing the movement of the ankle. This technology is proven to help runners feel fresher longer, creating a smoother and more comfortable ride. * Sustainable sockliner dye * Engineered mesh upper improves breathability * Weight: 7.9 oz * Heel to Toe Drop: 5 mm