and to not put on two tunics,a but to wear sandals.” Bible see other translations
Greek is chitōn, a long garment worn next to the skin usually under outer clothing.

“two tunics.” The “tunic” was the long shirt that was against the skin, like a very long undershirt. Sometimes travelers would take an extra one to keep from being cold. Jesus was making it clear that if the apostles were doing what he instructed and really helping people, their needs, which were little, would be taken care of. The outer garment was a thick cloak, that was for warmth, weather protection, and could serve as a blanket to sleep under at night.

Commentary for: Mark 6:9