The term 'Piece of Hockey Equipment' can be summarized as a MASK, which is a four-letter word. A MASK is a piece of protective equipment worn by hockey players to protect their face from injury. It is usually made of fiberglass or plastic and is designed to cover the entire face, including the eyes, nose, and mouth. The MASK also helps to reduce the risk of facial injuries caused by sticks, pucks, and other objects.