The vehicle, in car form, is a pink Cadillac Series 62 convertible. The boat is a regular-sized boat mobile with many superhero features to it, such as the "origami button," which folds the boatmobile and the people inside into an origami shape. SpongeBob claims to know lots about the boat, but pressed the aforementioned button.
The boatmobile has a more powerful engine than normal boats to enable the heroes to get to the situation where their help is needed faster. In addition to the engine, the boat mobile has manual transmission and a "torpedo mode" ejection system.
- The boatmobile was once almost completely painted black by SpongeBob and Patrick, thus defeating the purpose of it being invisible. Mermaid Man finds it funny, while Barnacle Boy does not in "Mermaid Man and Barnacle Boy." Ironically, Barnacle Boy states in "Mermaid Man and Barnacle Boy II" that making the boatmobile invisible was a stupid idea.
- Barnacle Boy commonly gets burned by the tailpipe of the boatmobile when Mermaid Man starts it up.
- In SpongeBob's Mermaid Man movie, the invisible boatmobile is ironically played by the very visible Pearl and a mountain climber.
- When using the Invisible Boat alarm, the boatmobile is fleetingly visible and revealed to be a beat-up pink Cadillac convertible: in particular, the 1959 Cadillac Series 62 convertible driven by the late King of Rock, Elvis Presley. However, when SpongeBob and Patrick paint half of the boatmobile or run it into a street light, it appears to be shaped like a boat.
- As revealed in "Mermaid Man and Barnacle Boy IV," the boat has a manual transmission; when the two are trying to escape from SpongeBob in the boatmobile, Barnacle Boy exclaims "I told you we should have got the automatic!"
- It is a parody of Wonder Woman's Invisible Jet and Batman's Batmobile.
- In "Back to the Past," Barnacle Boy refers to it as "The Invisiboat."