What "clothing" does Ralston makeshift for himself to keep warm at night? What else does he do to stay warm from the chill?

Ralston punches out the bottom of his digital camera bag to use as a sleeve on his left arm. On his right arm, he wraps the webbing around it to keep it warm. For his legs, he creates "pants" with his rope to keep them warm. In addition to his "clothing," he fits what he can of himself into his rope bag which keeps his warm breath around him. Ralston also resorts to chipping away the stone or pulling on his pulley system to create body heat.