Body of Light Within a Body of Skin

[The Shla"h] writes that the meaning of "He dressed them in a garment of skin (עור)" this is the body, as in "in skin and flesh he dressed me", that after the sin it became a material body, which is not the case before the sin when it was a holy, refined, clean body, and this is called "garment of light (אור)".

[...] Before the sin it was a garment of light and the body was light, illuminating like the neshoma. This is the Great Luminary and this is the Small Luminary. The neshoma in a body of light, this is "garment of light and the body is light in a body of flesh garment of flesh, like it swallowed the Hol in its covering, but the garment of light was not nullified but only swallowed by the covering.

Tzemach Tzedek, Sefer Hachakira, p.68