Allbirds, the B Corporation certified Californian brand of footwear and apparel, opened two stores in the U.S., bringing its global network to 43 units.

The brand opened a new 3,975 square foot space retail store and community center in Fulton Market. It is its third store in the Chicago area. Another 3,259 square foot space was opened in Green Hills. It is the brand’s first store in Nashville.

The stores enable customers to see the carbon footprint of each product displayed. Allbirds claims it is a first for the fashion and footwear industry, and a hallmark of its approach to sustainability.