14 karat gold-filled jewelry features a thick, durable layer of 14K gold pressure-bonded to jewelers brass, creating a quality, affordable alternative to solid gold that looks similar and designed for long-lasting everyday wear. Gold-filled jewelry has a layer of real gold that is over one hundred times thicker than gold plating, making it more durable and less likely to cause allergic reactions. It is safe to wear in water, though as with all jewelry, chlorine should be avoided.