Allbirds 0919 Gray Wool Runners Sneakers Men's Size 11Shop the one that started it all: Our Merino Wool Runners. Our superfine ZQ Merino wool material is incredibly soft and cozy, naturally thermoregulating, and ready for anything.Best For: Walking, cooler weather, everyday wearSuper Soft Material: Warm and cozy premium ZQ Merino wool provides next-level comfortVersatile Design: Wear-with-everything classic style, great for travelOur Wool Runners has a carbon footprint of 9.48 kg CO2e. Learn more about carbon footprint labeling and our commitments to reduce our impact. As a carbon neutral business certified by Climate Neutral, we balance our emissions by funding high impact carbon projects.Sustainable Materials:ZQ certified Merino wool upper that meets the highest standards of animal welfare, environmental care, and social sustainabilitySweetFoam® midsole made with sugarcane-based green EVAShoe laces made from recycled plastic bottlesCastor bean oil-based insole foamZQ merino wool heel lining