The Astral Body is the level of the Bio-energetic Field that surrounds and permeates the body within the 4th Dimensional frequency bands; it is the scalar-wave construct that encases the body in an "egg" of energy.

The Astral Body corresponds to the 4th Heart Chakra in the body's 15 Primary Chakra system.

(See: 15-Chakra Graphic and Astral Mind)

(Planetary Shields Clinic Field Guide – Page 48)

The 4th Dimensional frequency bands of the Astral Body corresponds to part of the Soul Matrix.

The Astral Body is an electromagnetic replica imprint of the 3-dimensional Density-1 body (Incarnate Identity) that forms form the Primal Life Force Fields of the Eiros (D-7,D-5 Eiron Field), EirA (D-10 Meajhe Field), ManA (D-11 Trion Field) and ManU (D12/13 Reion Field) of the combined Density-1 and Density-2 Radial Bodies.

The Astral Body vehicle activates when the Dimensional-Lock Seals (D-Lock Seals) between the Density 1 D-3 Mental Body opens to the Density-1 Radial Body and the Density-2 Dimensional Lock Seals between the Density-2 D-4 "Astral" Body and the Density-2 Radial Body open to each other, allowing the Density-1 D-3 Mental Body consciousness to expand into the Density-2 D-4 frequency bands.

The ability to "Astral Project" develops with the progressive activation of strands 4 and 5 of the DNA Template, through which the Dimensional  Lock Seals that keep the D-3 Mental Body consciousness confined to one Density and space-time vector release, allowing the Density-1 D-3 Mental Body "ego" awareness to traverse other regions of space-time and density.

(The Kathara Level 2-3 Foundations Manual - Page 69)