New Era Runner - FandomBoston Red Sox New Era Runner Fandom. The New Era Cap Black Performance Runner Adjustable Cap features a lightweight, performance fabrication throughout the cap with a curved visor. Additional details include a New Era Flag at the left wear side, a black undervisor, and an adjustable hook and loop strap at the rear. The New Era Runner features a 5 panel contour, unstructured crown with pre curved visor and an adjustable closure at the rear.