The phrase "proton packs" refers to fictional gadgets used to catch and contain ghosts. These devices are commonly seen in movies and cartoons like Ghostbusters. Full definition
Armed with proton packs and plenty of attitude, four women (Melissa McCarthy, Kristen Wiig, Leslie Jones, Kate McKinnon) prepare for an epic battle as mischievous ghosts start to wreak havoc in New York. (journalstar.com)
«Ghostbusters» reboot director Paul Feig has unveiled the new proton pack design, shortly after revealing the GB team's uniforms. (screenrant.com)
However, those who are at the «Con can still admire the movie's proton pack design up close and personal, as it's on display in the San Diego Convention Center's showroom floor. (screenrant.com)