A port shield was a protective blue energy barrier that sustained an atmosphere on an asteroid. One of these shields was in operation on Borgo Prime in the New Republic Era. This shield kept the breathable air separate from realspace, but it did permit space dinghies to move through it.
The first appearance of a port shield was in a trailer released on August 9, 2024; its canonical introduction occurred in the Star Wars: Skeleton Crew episode "Way, Way Out Past the Barrier," which was broadcast on December 2, 2024. Jedediah Barton, the narrator of the Disney+ audio description for the episode, supplied the device's name.