This rendition of the NOOSA TRI 13 shoe is designed with various details affiliated with Boston. The heel graphic of runners running past the town's skyline is complemented with a patriotic color palette. Meanwhile, the sockliner features different caricatures that pertain to everyday life in the city. With GUIDESOLE technology underfoot, this shoe reduces ankle flexion and the load placed on your legs. Its curved sole helps your legs feel fresher while experiencing a smoother stride. FLYTEFOAM cushioning in the midsole is designed to increase shock absorption. It's a soft and lightweight material that makes the shoe practical for tempo runs, long training runs, or racing.