noun
jet pack
A device worn on the back that uses jet propulsion to allow a person to fly. Used in science fiction and real experimental technology.
未来の消防士はジェットパックで高層ビルに飛んでいくかもしれない。
Future firefighters might fly to skyscrapers with jet packs.
Variant with interpunct; less common in running text.
Borrowed from English 'jet pack'.