What is a disadvantage of low pressure bags?

Low pressure bags are often used in rescue and lifting operations due to their ability to conform to the shapes of objects being lifted. However, a notable disadvantage is that they can be unsteady when lifting. This instability can arise from the way these bags expand and how they respond to the weight distribution of the load being lifted. If the load is uneven or if there is any movement, the low pressure bag might shift or tilt, making the lifting operation less secure and potentially hazardous.

In contrast, the other options do not accurately reflect the issues associated with low pressure bags. While they do not typically lift excessively high, the focus on stability during the lift is critical, and their weight or transport difficulties are not commonly cited drawbacks in comparison to the issue of maintaining balance and control during the lifting process.