Quick answer
EBXL HFFR describes a premium fire-safe house wire. EBXL means Electron-Beam Cross-Linked — the insulation is hardened by an electron beam rather than by chemicals or heat — and HFFR means Halogen-Free Flame Retardant, so in a fire it resists flame while giving off no halogen gas and very little smoke.
Together this delivers a wire that is heat-resistant, melt-resistant, long-lasting and far safer in a fire than ordinary PVC. APAR's Anushakti Fire Protekt (EBXL HFFR) is built this way, with up to 100% more current-carrying capacity and a service life measured in decades.
See also low-smoke zero-halogen (LSZH) cable and e-beam cross-linking.