|The following is based on Fallout: Brotherhood of Steel and has not been confirmed by canon sources.|
There are three variants of the body piece, two of which are called cloth shirt and pants and one simply named clothes. The set is completed by glasses, cloth gloves and two variants of cloth boots.
These are what you begin the game wearing. They offer no resistance to attacks, but at least they cover the unmentionables.”— Fallout: Brotherhood of Steel Official Strategy Guide