Latest Press Allbirds bioplastic biopolymers Share “Allbirds says its net-zero carbon shoe is here” featuring biopolymer from Mango Materials March 21, 2023 By Mango Materials Allbirds unveils a new sneaker with a net footprint of 0.0kg of C02 emissions. Mango Materials’ biopolymer is one of three materials to be featured in the shoe.