Bolt Threads is a company that develops biomaterials and biotech-derived ingredients for consumer and industrial applications. It manufactures protein-based materials such as b-silk protein, xl-silk polypeptide, Microsilk fibers, and Mylo mycelium-based leather alternatives for use in textiles and personal care products. The company supplies these materials to businesses in the beauty, personal care, apparel, footwear, and accessories industries.