Hello Kitty In Ghostbusters: The Cosplay Proton Pack | Bit Rebels
Ghostbuster Proton Pack for Kids
Ghostbusters Proton Pack Adult Sized Accessory
My full size custom proton pack I made to complete my costume. Got it as close as I could with what I had. Plan on adding some sound effects at some point. :
Hasbro Has Made A Movie-Accurate Ghostbusters Proton Pack | Cosplay Central