Enclosed Pillow Bags are totally enclosed, with over-pressure valves to vent expanding air as they ascend. The advantage of Pillow Bags over the Open Bottom Bags is that they can attain their maximum lift in much less water. For this reason, they are excellent for raising sunken boats, and for towing jobs. Like the Boulder Bags and the Ocean Salvage Tubes, all Pillow Bags come with brass quick-disconnect fittings attached to a short filler hose (connects to 1/4" pipe thread).
Pillow Bags illustrated:
the CBEP-250 to CBEP-1000 lb series bag on the left,
and the CBEP-2000 to CBEP-4000 lb series bag right.