Allbirds Men's Natural Grey Wool Runners Lace-up Shoes - size 12 - GUC (minor overall wear; worn lining at the heels - see pics)Retail $110Shop 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 wearWOOL UPPERIt’s soft and itch-free on the inside, durable on the outside, and ethically sourced to ZQ Merino’s high standards for a cozy fit that treads light on the planet.SUGARCANE MIDSOLEContoured and delightfully bouncy, our Brazilian sugarcane midsole is called SweetFoam®, which is made with the world’s first carbon negative green EVA.CASTOR BEAN INSOLEWe layered castor bean oil, which emits less carbon than petroleum-based foam, and ZQ Merino wool for a cushiony, moisture wicking, and odor reducing insole.RECYCLED LACESOur laces are made from 100% post-consumer recycled polyester. One old plastic bottle becomes one pair of shoelaces.