Abstract: A coat having a thickness of material in a chest region that is thinner than a thickness of material in the sleeves in order to allow a safety harness to be tightened snuggly against the chest of a wearer of the coat. A vest may be worn over the coat to augment the thermal insulating properties of the torso region of the coat when it is not being used with a safety harness. Alternatively, the coat may include a chest cover attached at the sides of the torso region, with the chest cover being opened at the front of the chest to provide access to the chest region for tightening of the safety harness, and closed after the harness is tightened to provide additional thermal insulation. Sleeves of the coat may include an outer material which can be removed for use of the coat in warmer temperatures.