In this episode of ACR Journals on Air, host Dr. Vicki Shanmugam returns to the mic and dives into the CLASS Project—an ambitious international study on anti-synthetase syndrome recently published in Arthritis & Rheumatology. Joined by Drs. Sara Faghihi-Kashani, Akira Yoshida, and Giovanni Zanframundo, she explores the clinical characteristics, antibody profiles, and skin and lung manifestations of this complex autoimmune condition. The conversation covers everything from global collaboration challenges to nuanced antibody testing and rare clinical features like hikers' feet. With insightful perspectives from each guest, this episode sheds light on the evolving understanding of anti-synthetase syndrome and the future directions of the CLASS initiative.