Closed parachute bags are a type of closed-bottom underwater lift bag. They are enclosed, parachute-shaped flotation bags with a single lifting point at the bottom.
The term “closed-bottom lift bag” describes the bag’s enclosed design, while “closed parachute bag” describes the specific shape and configuration. In other words, all Joint Zone closed parachute bags are closed-bottom lift bags, but “closed-bottom lift bag” can be used as a broader category term.