Allbirds

Allbirds pioneered the use of merino wool, eucalyptus fiber (Tencel), and sugarcane foam (SweetFoam) in footwear, displaying a carbon footprint label on every product. Its running shoe lineup has been marketed around some of the lowest published carbon footprints in performance footwear. The company's mission to prove business can be a force for climate good has inspired a generation of sustainable footwear brands.