The Brewster Body Shield or Brewster Body Armor was the first effective body armor developed for the United States Army in World War I, designed by Dr. Guy Otis Brewster from Dover, New Jersey. During World War I, the United States developed several types of body armor, including the chrome nickel steel Brewster Body Shield, which consisted of a breastplate and a headpiece and could withstand Lewis Gun bullets at , but was clumsy and heavy at . A scaled waistcoat of overlapping steel scales fixed to a leather lining was also designed; this armor weighed , fit close to the body, and was considered more comfortable.