Last week, San Francisco-based Bolt Threads unveiled its first product for customers: a necktie made from its synthetic spider silk fiber. Bolt Threads’ product launch includes 50 limited edition neckties that consumers can purchase through a lottery hosted on the company website. Selected participants will have the opportunity to buy the necktie for $314.15 on March 14.
Bolt Threads uses genetically engineered yeast to produce synthetic spider silk proteins via fermentation. After harvesting, purifying, and drying the protein to a powder, Bolt Threads wet-spins it into a yarn-like fiber. For its necktie, Bolt Threads weaves the yarn into a chevron pattern representing the molecular structure of the spider silk proteins. The company recently built a new 11,000 ft2 fiber spinning facility to scale up its manufacturing capacity. Continue reading