Mycelium, the soft, dense and strong roots of fungi, are being used in mycotextiles, a potential replacement for leather. MycoWorks, a South Carolina-based biotechnology company, is working on a scalable approach to grow uniform sheets of interwoven mycelium that are customizable for varying thickness, surface features and dimensions. The goal is to produce a more ethical, environmentally sustainable and efficient alternative to animal leather. The fungus is grown in sterilized agricultural waste such as sawdust and bran, and the growth process ends when the sheets of mycelium are peeled off the sawdust block, at which point they can be tanned and crafted into a range of marketable products. To date, MycoWorks materials have been used in designer handbags for Hermes, making them biodegradable at the end of their life cycle.