the Self is concealed within five sheaths, five superimposed psychosomatic layers. The first and most substantial is that known as anna-maya-kośa, ‘the sheath made of food,’ which is, of course, the gross body
Zimmer provides the most sustained primary exposition of the pañcakośa doctrine in the depth-psychology corpus, identifying each sheath by name and correlating the first with waking consciousness as described in the Māṇḍūkya Upaniṣad.
, Philosophies of India, 1951thesis