HI-DEF NEON* Color Coated Acoustic Guitar Strings are available in a wide variety of luminescent color options designed to give your stage presence a little extra pop, especially under UV black lighting. They feature a hexagonal core wire and a silver-plated copper wrap wire on the wound strings. All strings include the neon colored K3* coating, delivering longevity, more projection, fewer unwanted overtones, plus enhanced clarity and articulation.