This is the Carter Underwater 500 lbs Lift Bag Enclosed Pillow Style Lift Bags Features: Great for Shallow Water Recovery Brass Quick Disconnect for Fill Line One or More Handles and Tie-Off Points Easy to Handle In-and-Out of Water Fold and Roll to Compact Size Negatively Buoyant when Empty One or More Over-Pressure Relief Valves Durable and Strong Construction Urethane Coated Nylon Material Light Attachment Points Color: White Carter Enclosed Pillow Bags are totally enclosed and have 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. All pillow bags come with brass quick-disconnect fittings attached to a short filler hose (connects to 1/4 pipe thread). Bag comes equipped with over-pressure relief valve or valves depending on size. All Carter Bags have one or more handles and tie-off points to make them easy to grasp and secure both in-and-out of water. All Carter Bags are designed to be folded and rolled into compact, negatively buoyant rolls that are easy to handle and deploy underwater. The over-pressure valves on all Carter Bags are designed to adequately vent the air from a fully charged bag on a free ascent from any depth. The Carter Enclosed Pillow Lift Bags are available in multiple lift capacities from 250 lbs. to 6,000 lbs. (113.64 to 2,727.27 kg) and measure (W x H) from 45" x 32" to 96" x 87" (114.3cm x 81.3cm to 243.8cm x 221cm). The Carter Enclosed Pillow Lift Bags are white in color. "