Affective solidarity is important in resisting forms of gender, race, and sexual inequalities. Previous research has highlighted the role of affective dissonance in building affective solidarity, yet most of the literature has been anthropocentric in its discussion of affect. This paper contributes by showing the importance of vibrant forms of matter in inspiring and building affective solidarity. Using affective ethnographic method, the article explores how an independent yarn dyer, the Countess Ablaze, organized affective dissonance at gender discrimination into an affective solidarity movement called the Tits Out Collective. In doing so, she energized resistance and built a powerful affective atmosphere in the global yarn community. The paper shows how the vibrancy of the materialities accelerated the building of the powerful affective atmosphere. The engagement with different materialities enabled a global community of women to participate in shared resistance while honoring their own subjectivities, something previous work has identified as problematic. The paper also contributes by opening a discussion of the costs of organizing affective solidarity, detailing the intensities of leading such movements, that can be exposing and increase vulnerabilities. Therefore, it may be inevitable that affective solidarity is precarious and ephemeral.