Bioworks Co., Ltd. (Headquarters: Soraku-gun, Kyoto Prefecture, President and CEO: Koji Sakamoto, hereinafter "Bioworks") announced that its plant-derived next-generation synthetic fiber "PlaX (Purakusu)" has been adopted for limited edition souvenir T-shirts of the original brand "Goldwin," operated by Goldwin Inc. (Headquarters: Minato-ku, Tokyo, President and CEO: Takao Watanabe). The souvenir T-shirts using PlaX will be available as limited edition items for "Goldwin Shinsaibashi," Goldwin's second store in the Kansai region, which will open on July 31, 2026. Background of PlaX Adoption for Souvenir T-shirts Goldwin pursues functionality and manufacturing rooted in Japanese aesthetics, guided by the spirit of "Dedication to Detail" that has been cherished since its founding. As the souvenir collection is seen and handled by many customers, there was a desire for the materials used to embody Goldwin's identity and the spirit of "Dedication to Detail." With this in mind, material selection was considered for the opening of Goldwin's new store. As a result, a fabric combining cotton, which is familiar and reassuring to customers, with "PlaX," a plant-derived synthetic fiber that replaces petroleum-derived materials, was adopted. The fabric developed this time realizes comfortable wearability by placing "PlaX" on the skin side, leveraging its "material-derived antibacterial and deodorizing function" that suppresses the growth of bacteria on the fibers, which are the source of odor. "PlaX," independently developed by Bioworks, is a synthetic fiber derived from plant-based raw materials such as sugarcane. In addition to its environmental performance as a plant-derived material, "PlaX" possesses functionalities not found in conventional synthetic fibers, such as antibacterial and deodorizing properties. "PlaX" was evaluated as a material that embodies the functionality and Japanese aesthetics pursued by Goldwin, and was adopted for its ability to realize product manufa