It provides efficient buoyancy in case of shipwreck or Man Overboard, allowing the casualties to gather for easier survival and rescue. Made of indestructible plastic material. High density polyethylene, filled with polyurethane foam for buoyancy. Fitted with retroreflective tape for added visibility. Braided rope is reeved through reinforced eyelets at regular intervals (2, 3 or 4 eyelets on each side) to account for a larger number of persons grasping the rope. Approved by the Italian Merchant Marine.