Subtle Body
Subtle Body is a term referring to any of the subtle-energy bodies which exist in the higher frequency octaves beyond the physical, like, e.g., the etheric, astral, mental and causal bodies. (Definition by R. Gerber, Vibrational Medicine, Glossary).
Sources do not agree on whether there would be six or seven layers of subtle bodies. Richard Gerber, e.g., distinguishes 6 layers, while Barbara Ann Brennan distinguishes 7 layers.