Shop the one that started it all: The Original Wool Runners. Allbirds’ superfine ZQ Merino wool material is incredibly soft and cozy, naturally thermoregulating, and ready for anything.ZQRx Regenerative Wool Material: The wool used for Regen Capsule is grown using regenerative farming practices that aim to help reverse climate change through practices that restore and preserve nature.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 travelCushioned midsole gives wear-all-day supportMachine-washable materials keep shoes looking like newGood preowned condition with wear inside, as shown in photos, Please see all pictures carefully, as they’re part of the description. Zoom in if needed to see all details.