A dress made from living fungi can repair itself after damage by regrowing over a breach, and it can biodegrade visibly in soil after just over 40 days. That single line is the entire point: this is not a conventional “biomaterial coating.” It is a textile built from living, intertwined fungal filaments, with biological activity that can pause under dry conditions and reactivate under humid, nutrient-rich ones.

Researchers led by Ke Li at the Chinese Academy of Sciences describe a living textile derived from the parasitic fungus Cordyceps militaris, using its hyphae to form a continuous, self-supporting sheet. The team also created a dress from the material, though it has not been worn by people yet. The studio demo, in other words, is ahead of the consumer product reality. Still, the underlying materials science is clear and specific: they grew the fungus as spherical pellets in liquid culture, washed them, then formed sheets in molds. Instead of relying on a polymer mesh or a scaffold, they used the fungal mycelial pellets themselves as the structural building blocks, with hyphae interwoven into the fabric.

Why this matters now is that the fashion industry is under pressure from two directions at once. First, there is a growing push for materials that reduce waste from fast fashion. Second, “greener” materials get scrutinized the moment they cross from marketing claim to real lifecycle behavior, including what happens if an item tears, degrades prematurely, or sheds living organisms. In the New Scientist reporting, Justin Beardsley at the University of Sydney highlights the tradeoff bluntly: the biodegradability is “amazing” compared with how apparel waste is currently handled, but biodegradability can also be a drawback if you do not want your clothing to break down while you are wearing it.

The researchers try to solve some of the performance problems that would normally make a living fabric unusable. They say the material feels denser and less fibrous than cotton, more like a soft, non-woven sheet or a flexible, leather-like material. Cordyceps, in their description, is also not meant to smell like mushrooms after preparation. Li notes that after washing and processing, there is not a strong mushroom-like odor; a slight biological or fermentation-related odor may be detectable in freshly prepared samples, but it can be greatly reduced through cleaning, drying, and post-treatment. That is the kind of detail that matters for any path toward commercialization, because consumer tolerance is not a lab metric.

To prevent brittleness, they soaked the textile in glycerol, describing it as a “plasticiser” that makes the naturally rigid fungal structure softer and more flexible. That is one lever. Another lever is programmable biology. Li and her colleagues report that the textile can be “programmed” with different properties by adding various microbial components. For color, they introduced engineered yeast cells that produce orange, blue, and purple pigments, generating color biologically instead of using conventional synthetic dyes. For self-cleaning behavior, they showed they could change properties by adding other fungi, including making it clean itself by repelling water droplets.

They also built in photoprotection. For UV protection, the team added Aspergillus niger, a mould that commonly grows on fruit and vegetables. The approach is mechanistic: the added mould forms a dark layer on the surface containing melanin pigment, which absorbs ultraviolet radiation. When you strip away the sci-fi gloss, this is the same logic used across many bio-based materials: use biological structures or metabolites to achieve a function. The difference here is scale and integration. You are not embedding a one-time additive. You are adding living components into a living base, which means the behavior can depend on environmental conditions.

That environmental dependence is exactly what enables the headline-grabbing capability: self-repair. If the textile is damaged, fresh, wet fungal pellets can be applied to the area needing repair, and the fungus grows over the breach. Under dry conditions, most biological activity is greatly reduced and cells can remain inactive or dormant. Under humid conditions with nutrients present, some cells can become active again. Li frames this latent biological capacity as the key to functions such as regrowth and repair, while also making the material readily biodegradable. In soil, the reporting states the material shows near-complete visible degradation after just over 40 days.

So what does this mean for decision-makers? In the short term, it demands a hard-eyed view of product timing and safety. A living textile that can reactivate in humidity and nutrients is not just a new fabric. It is an ecosystem with behavior that can change between wear, storage, and washing cycles. In the medium term, it raises regulatory and certification questions around biodegradation tests, residual organism handling, allergen and irritant profiling, and whether added microbes behave differently in real supply chains than they do in controlled lab conditions. And in the long term, it points toward a new category of materials where clothing is closer to a device with a lifecycle than a static product.

Beardsley’s observation about real-world wear captures the key stake: you do not want clothing that is “too easily biodegradable,” because it could break down while you are wearing it. At the same time, the ability to change qualities in real time is the tantalizing promise. He envisages a scenario where the material becomes water-repellent for a while, less breathable during rain, and then reverts afterward. The researchers themselves take an incremental step first, acknowledging they treated the dress as a “precious display piece” and made it in a small size. The next step, in their words, is to find volunteers to try it on and see how it looks in motion.

For boards, investors, and operators in adjacent materials and consumer goods, this is a reminder that “biodegradable” is not a single number. It is a set of living behaviors you have to govern: growth, dormancy, activation triggers, and degradation kinetics. Cordyceps-based textiles may still be early. But the direction is not subtle. A fabric that can self-repair and regenerate under humidity is a profound shift in what apparel can do, and it will reshape expectations for product design, testing timelines, and lifecycle economics the moment it moves from display to daily use. The Journal reference cited in the reporting is Science Advances, DOI: 10.1126/sciadv.aed6937.