The Grateful Dead-affiliated Rex Foundation, which members of the band founded in the ’80s to house and support their charitable endeavors, has teamed with Connecticut-based Dead tribute act Terrapin for the group’s upcoming run of Northeast dates.

Terrapin will be promoting Rex throughout their spring dates and donating all proceeds from the band’s limited-edition poster sales to the organization. Each stop on the tour will offer a different exclusive poster with what the band calls and “avant-garde visual approach to a Dead song or lyric.” Posters will only be available on-site at the shows.

Terrapin’s Northeast run kicks off April 27 at the Space Ballroom in Hamden, CT, and will hit stops around the region into June. All show information can be found at Terrapin’s website.