Workers who face bodily injury during performance of their jobs need the appropriate type of body protection.  Some hazards that contribute to the need for this protection are: weather extremes, impacts from tools or machinery, chemicals, hot splashes from liquids or molten metals, infectious materials; there are other hazards too numerous to name.
A variety of protection ranges from lab coats, vests, jackets, aprons, surgical gowns, coveralls to full body suits.