A body protector is a piece of protective clothing worn to protect the body from physical harm. It is usually made of a thick material such as leather or Kevlar and is designed to absorb the impact of blows, falls, and other forms of physical contact. The term 'body protector' can also refer to a type of SKIN, which is a four-letter word in this crossword puzzle. SKIN is the outermost layer of the human body and serves as a barrier against infection and injury. It is composed of several layers of cells and provides protection from the environment.