Designers are increasingly turning to alternatives to plastic, and one popular replacement comes from fungus. Experts are experimenting with mycelium for everything from construction materials to fashion and now sporting equipment, such as bicycle helmets. A new project allows the consumer to ‘Grow It Yourself’ to avoid plastic without sacrificing durability. Created by NOS Design and Agustin Otegui in collaboration with Diego Mata and Axel Gómez-Ortigoza, the Grow it Yourself Helmet is 100% compostable, breathable and impact-resistant. Related: World’s first “living coffin” made of mycelium is used in a burial Made from a combination of hay and mycelium, the helmet literally grows from natural materials that will decompose back into the soil in about one month after the helmet’s lifecycle.