The V-shaped necklace naturally fits business as well as casual and formal. Pure titanium with a profound feeling and light weight is used for the fasteners.It can be removed with one touch from either the left or right. Strings using two types of materials: Black uses 66 nylon with superior strength equivalent to bulletproof vests. In addition to black, we use leather touch materials that make the most of the real leather texture. This aqua titanium is impregnated into the string at a concentration 100 times the normal. The string is impregnated with Phiten's highest technology Metax (* compared to our company). [Phiten Nanotechnology] Phyten's water-soluble metal technology that disperses metals in water at the nano level has created various materials. This technology supports more comfortable everyday life.