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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. 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.