Made with an eye toward sustainability, with a Tencel® lyocell upper and responsive foam cushioning, this shoe keeps you running and working out in comfort. The high-performance midsole made with sugarcane-based SweetFoam is optimized for cushion, stability and energy return. Even the laces do their part, fashioned from fiber made from recycled plastic bottles. Cushioning: absorbs impact and distributes weight for consistent, buoyant comfort under each step Textile and Tencel lyocell upper/merino wool lining/rubber sole Tencel lyocell is a sustainably produced fiber made with closed-loop processing Imported 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 Forest Stewardship Council® (FSC) certified, ensuring forest management that preserves biological diversity and benefits the lives of local people and workers This brand has B Corp certification, representing business practices with emphasis on social and environmental performance, accountability and transparency This brand meets Nordstrom Responsible Brands criteria: brand adheres to responsible social and environmental practices Removable Insole