Made to Go with the flow, the fan-fave Tree Runner Go sneaker from Allbirds keeps its signature breathable comfort while hitting the refresh button with a new elevated aesthetic and more springy support. Design offers enhanced durability in the toe and features a sleek, elevated look. Lightweight, breathable tree fiber in the upper material delivers a cool, comfortable ride. And so began the journey of Allbirds....To reduce the emissions of material sourcing, the use of natural materials like wool, wood, and sugarcane are used as much as possible.