Allbirds Wool Runners Mens Shoes Black Size 9 Low Top Lace Up Casual. Pre-owned in great condition. Sustainable Materials: ZQ certified Merino wool upper that meets the highest standards of animal welfare, environmental care, and social sustainability SweetFoam® midsole made with sugarcane-based green EVA Shoe laces made from recycled plastic bottles Castor bean oil-based insole foam ZQ merino wool heel lining