The Ingredients: S-X uses large 24 AWG solid Silver-Plated Long-Grain Copper (SP-LGC) insulated with Nitrogen Injected Foam (NiF). SP-LGC allows maximum high frequency conductivity for a fraction of the cost of solid silver. NiF reduces distortion caused by the insulating material, and helps maintain a stable 75?. The braid+foil shield provides 100% protection. The highest grade gold S-connectors are optimally connected.