Facemasks have become integral to everyday life. We propose that exposure to facemasks with a solidarity-related cultural symbol can activate cultural values such as mutual trust and increase corresponding interpersonal perceptions, thereby enhancing collective resilience in the Covid-19 pandemic. In three (two of which preregistered) studies, we examined whether exposure to facemasks with a solidarity-related cultural symbol predicts positive interpersonal perceptions, and whether this depends on death awareness. Across studies, exposure to facemasks with a cultural symbol (either pride flag or National Health Service) increased positive interpersonal perceptions, an index of solidarity, in people for whom this symbol represents a meaningful social identity. This was found whether participants were reminded of death, a neutral experience, or a negative experience. Importantly, in Study 3, exposure to facemasks with a solidarity-related cultural symbol (vs. surgical) led to greater increases in positive interpersonal perceptions when death awareness was high. Together, our findings suggest that wearing facemasks with a cultural symbol that relates to solidarity can be a vehicle for shaping people's personality impressions of others. Applied directions for the activation of people's social identities via facemask selection to promote collective resilience in the Covid-19 pandemic are discussed.