Allbirds Wool Runner Sneaker Lace-Up Super Fine ZQ Merino Wool Red Men -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 liningPre-owned in great condition.