Scientists have developed a new eco-friendly material by growing mushroom mycelium on polyester-cotton textile waste, creating a biodegradable composite that could replace plastic foams. The best results came from a blend of 65% polyester and 35% cotton, which provided a good balance of strength, moisture resistance, and the ability to break down naturally in soil. This innovation offers a promising solution to the massive problem of textile waste, which currently piles up in landfills around the world.