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. The NOOSA TRI™ 13 shoe has FLYTEFOAM™ technology in the midsole, which gives the runner a lightweight feel and more cushioning for longer runs.Following a more sustainable design approach, this shoe also uses fewer resources to color the sockliner. Additionally, the AHARPLUS™ outsole is designed to improve durability and extend the life of the shoe. Now even lighter in weight, this triathlon shoe is functional for a variety of running workouts, including tempo runs, long training runs, and racing.