This appears to be unused!! No signs of use!! VERY CLEAN AND THE METAL PLATE IS COMPLETELY SPOT FREE! I don't know much about the way it works, but have to imagine that if used would show some signs of water or salt spots. May need to be serviced prior to use. This is Heavy! And weighs roughly 15lbs. Open Habitat is a Dive Shop in Orange County, CA.  See photos for details. The product is an unused XL-XXL size Open Water Habitat Buoyancy Compensator designed in the USA. This scuba gear is vital for maintaining safety while underwater, especially in open water environments. The buoyancy compensator provides added security and flotation to help scuba divers stay afloat and conserve energy while navigating in the water. This high-quality, USA-designed product is sure to enhance the experience of scuba and snorkeling enthusiasts.