Designed and manufactured for handling or lifting heavy loads underwater, such as raising sunken ships. Made from coated technical fabrics and lifting straps, these bags are equipped with pressure relief valves to avoid overinflation. Divers operate them using compressed air.

Depending on the task, single or multiple bags can be used simultaneously, with spreader bars sometimes employed for weight distribution.
Two types are available: closed parachute (cylindrical) and open parachute (balloon-shaped).
Advantages:

• Compact and easy to store
• High strength
• Standard range: lifting capacities from 100 kg to 10 tons