The marine rescue patrol can bodies are hard and lightweight, made of HDPE( high-density polyethylene). The molding process creates a hollow, air-filled buoy, causing the emergency rescue can to be extremely buoyant and able to support multiple victims during rescues. It won't break free falling from a height of 4 meters, with load-bearing of 100KG-150KG. It can save the drowning person out of danger in the shortest possible time and in the most convenient way.