Sneaker startup Allbirds is committed to using sustainable environmental practices to make the world's most comfortable shoes. They recently launched "Tree," a line of shoes with material sourced from eucalyptus. This new Tree Collection has a knitted mesh upper, which allows for air to go in and out of the shoe for maximum breathability. It follows their very popular wool collection launched in 2016, designed not to be worn with socks.
www.allbirds.com