Titanium chains are the lightest chains in the jewelry industry. Therefore it is extremely comfortable to wear. We use CP2 grade titanium alloy for our chains they are hypoallergenic and will not cause any allergic reaction on any skin types. Since our titanium chains are all made from solid titanium alloy without any plating they will never change color or turn your skin green they really do last forever and give the wearer the peace of mind. All our titanium chains come with lifetime warranty against craftsmanship defects. This titanium chain has a gray color of the pure titanium. It features a lobster claw clasp for secure closure. Another benefit of titanium chains is that it is relatively tarnish and corrosion resistant compared to most silver or costume jewelry so it can be worn in the pool or in the ocean without the risk of tarnishing. It is the best choice for people with active lifestyle.