Tread lighter with Allbirds shoes made from natural material Recognized as the most comfortable shoes in the world, Allbirds has proven that comfort, style, and durability can go together with sustainability. The material innovation such as merino wool, eucalyptus tree fiber, and sugar cane, inspired from mother nature has created the comfiest shoes on the planet while being light on the planet. We are committed to fighting the climate change, and reducing our environmental impact has been a top priority since day one. With the Allbirds Flight Plan, our bold list of sustainability commitments, we plan to cut our carbon footprint in half by 2025. Then reduce it to near zero by 2030. In the meantime, we’ll continue to be 100% carbon neutral.