Allbirds Mizzle Wool Runner Water Repellent Sneakers New in Box Women’s Size 9 A merino-wool upper makes this lightweight sneaker soft and cozy, naturally thermoregulating. Crafted with a bio-based water-repellent shield built on a springy sole made with FSC-certified natural rubber for a feel-good fit. Lace-up style Merino wool upper and lining/rubber sole FROM ALLBIRDS: The SweetFoam™ midsole is made with sugarcane-based EVA, a carbon-negative alternative to EVA foam derived from petroleum. The sugarcane is sourced from southern Brazil, where it relies on rainwater, not irrigation. It’s sourced according to rigorous standards jointly developed by Proforest and Braskem, and the farms are audited by a third party. AllBirds is allowing its Carbon Footprint tools to be open source rather than proprietary, so it can make a difference in the shoe industry as a whole