Allbirds The World's Most Comfortable Shoes, Flats, And Clothing Made With Natural Materials Like Merino Wool And Eucalyptus. Building a "better product in a better way" is never easy, and while our journey is just beginning, here are some of the successes we've had so far. New Zealand-born Tim Brown was no stranger to the magical qualities of merino wool. Always curious, he began to ask himself why such an amazing and sustainable material was missing from the footwear industry. And so began the journey of Allbirds at codencart.com