Allbirds, the B Corporation certified Californian brand of sustainable footwear, has launched its first apparel line. It is available in the company’s 21 stores in the U.S., Europe, China and New Zealand and online.

The collection comprises T-shirts made out of a fiber derived from discarded crab shells, cardigans and sweaters produced with merino wool from New Zealand and puffers made of a merino wool and Tencel blend and filled with recycled polyester.