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 Shoes just got lighter in weight and is now designed for a wide range of runners. The NOOSA TRI™ 13 Shoes'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 Shoes 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 Shoes also uses fewer resources to color the sockliner. Additionally, the AHARPLUS™ outsole is designed to improve durability and extend the life of the Shoes. Now even lighter in weight, this triathlon Shoes is functional for a variety of running workouts, including tempo runs, long training runs, and racing.