This is the underlying layer of the skin which consists largely of adipose (fat) tissue, blood vessels, nerves and lymph channels. The thickness of the Subcutaneous Layer is determined by where it appears on the body.
This is the layer of skin which provides its cushioning, to absorb shock from physical trauma, and serves as an insulator to protect against external temperature extremes.
As with the Dermis, the Subcutaneous Layer contains collagen and elastin fibers.