Forty-nine necklaces designed to stay on. Names, initials, birthstones, tennis chains, charm pendants, all cast in waterproof Premium 18K Gold Plated (PVD) over 316L stainless steel. A bonded PVD build, not thin electroplating over cheap metal. Real 18K gold layered over 316L stainless steel, engraved and sculpted to survive shower, sea, gym and sleep.