Allbirds, the eco-friendly footwear brand, has launched a new resale platform as part of its commitment to sustainability.

Called Allbirds ReRun, the offering will initially give customers at three stores the option of trading in their preloved Allbirds shoes for $20 in store credit. Following the launch in Los Angeles, Chicago and New York City, the initiative will be expanded to additional retail locations.

Products sold through the scheme will be slightly imperfect and “gently used” shoes at reduced price points, starting at $59. ReRun will initially only be available in the US.

Allbirds Re-run will be operated in partnership with branded re-commerce specialist, Trove.