Grassroots California is a progressive clothing line that is based in Denver, CO. Founded in 2008, Grassroots donates a portion of every sale to a number of charities. Their specialty is making custom hats and they often collaborate with events, companies, and artists to create one-of-a-kind fitted hats. What truly makes Grassroots unique is that the inside of every hat is a different design that is often chosen by the collaborator. In 2013, Grassroots California combined forces with Hitman Glass to hold the first annual 710 Cup.