These psychedelic optical spiral t-shirt designs were created for the Grateful Dead “Fare Thee Well” Celebrating 50 Years concerts official merchandise line. The original members of Grateful Dead were joined by Trey Anastasio (guitar), Jeff Chimenti (keyboards) and Bruce Hornsby (piano) to perform at Levi’s Stadium in Santa Clara, California on June 27th and 28th and Chicago's Soldier Field on July 3rd, 4th, and 5th. These run of shows marked the original members' last-ever performances together as the Grateful Dead.