'Outer' in the Bible

he got up from the meal, removed his outer clothes, took a towel and tied it around himself.

So when Jesus had washed their feet and put his outer clothing back on, he took his place at the table again and said to them, "Do you understand what I have done for you?

Then the disciple whom Jesus loved said to Peter, "It is the Lord!" So Simon Peter, when he heard that it was the Lord, tucked in his outer garment (for he had nothing on underneath it), and plunged into the sea.