Jari "WERC" Alvarez (1980- ) is a graffiti artist who was born in Mexico and raised in Texas. Geraldine "Gera" Lozano (1981- ) is a public artist from New Jersey. They both reside in Brooklyn, N.Y.
Alvarez and Lozano produce artwork independently but have collaborated on public works of art in Mexico, Paraguay, Brazil, Peru, New York, and Texas. Their mural, Portal Flow, done as part of the Gateways to Newark initiative in Newark, N.J., is the largest mural on the east coast. As collaborators, they focus on beautifying public environments through creating work that honors the surrounding communities.