Inspected and tested in accordance with U. S. Coast Guard regulations. All rings contain unicellular polyurethane foam for buoyancy. Floating polypropylene grab lines are secured inside the foam core and contain UV stabilizers to ensure sunlight resistance. Molded-in becket design means there are no straps to wear, mildew, or deteriorate. Tough, hardshell polyethylene skin. Taylor Made Products' unique fluorescent color process incorporates a "back-up" color that resists fading, providing acceptable color much longer than competitive products. Orange is a high visibility color that exceeds red or yellow in visibility at a distance.