Adidas and Stella McCartney used vegan spider-style silk by Bolt Threads to create the Biofabric Tennis Dress, which can "fully biodegrade".
The Adidas x Stella McCartney Biofabric Tennis Dress is made using Microsilk, a bioengineered yarn made from yeast by Californian biotech startup Bolt Threads.
The Microsilk fabric eventually breaks down back into the environment, making the dress fully biodegradable, Adidas claims.
While fabrics such as wool or cotton are often labelled as biodegradable, the chemical treatments they undergo to be made into garments can slow down the break-down process or stop it altogether.
Biofabric Tennis Dress is made using a bioengineered yarn called Microsilk
"Fashion is one of the most harmful industries to the environment," said McCartney. "We can't wait any longer to search for answers and alternatives. By creating a truly open approach to solving the problem of textile waste, we can help empower the industry at large to bring more sustainable practices into reality."
To create Microsilk, Bolt Threads studied the silk made by argiope bruennichi ? a type of orb-weaver spider that commonly spins its own web ? then recreated a version of the proteins in a laboratory.

In order to do so, scientists at the start-up bioengineered genes in the lab and implanted them in yeast.
Together with sugar and water, the yeast produces protein through fermentation. Liquid silk proteins are then extracted and spun into yarn to weave...