Vivienne Westwood is known for her innovative and sustainable fashion designs, and she has been a vocal advocate for circular fashion.

Circular fashion design aims to reduce waste and pollution, create clothes that are durable and long-lasting, and use recycled and upcycled materials.

Marine Serre is known for her innovative use of upcycled materials, such as discarded clothing and textiles.

Patagonia's Worn Wear program allows customers to buy, sell, and trade used Patagonia clothing.

Gabriela Hearst is known for her work with indigenous communities, and she uses traditional techniques and materials in her designs.

Eileen Fisher's Renew program allows customers to return their old Eileen Fisher clothing in exchange for store credit.

Iris van Herpen is known for her innovative use of 3D printing technology to create unique and sustainable fashion designs.

Stella McCartney's The Loop program allows customers to rent clothing and accessories, and then return them to be recycled or upcycled.

Zero Waste Daniel is known for his innovative use of deadstock fabrics, which are leftover materials from other fashion productions.

Patagonia's ReCrafted collection is made from recycled and upcycled materials, and the proceeds from the sales of this collection are donated to environmental organizations.

Gabriela Hearst is known for her work with sustainable materials, such as organic cotton, recycled wool, and Tencel.

Eileen Fisher's Renew initiative allows customers to return their old Eileen Fisher clothing in exchange for store credit.

Patagonia is known for its commitment to fair trade and ethical production, and the company has a long history of working with suppliers who share these values.

Stella McCartney's The Loop program allows customers to rent clothing and accessories, and then return them to be recycled or upcycled.

Marine Serre is known for her innovative use of upcycling and repurposing, and she often uses discarded clothing and textiles in her designs.