Boulder Bags derive their name from gold dredgers and nugget hunters who use them for lifting boulders in the shallow rivers of California's mother-lode country. They are designed to get a maximum amount of lift from a single lift-point in a minimum depth of water. For example, the 2000 pound Boulder Bag gets its total lift in less than 3 feet of water, whereas the 2000 pound Open Bottom Bag requires almost 8 feet of water. These bags are very durable and have been used as air jacks capable of exerting several thousand pounds of force over a large area.
| Model Number | Lift (lbs) | Shipping Weight (lbs) | Width x Height (inches) | Volume at Surface (63lbs/cu ft) |
| CBBB-1000 | 1000 | 18 | 54 x 58 | 32.0 |
| CBBB-2000 | 2000 | 27 | 54 x 86 | 48.0 |
