Abstract: It is an object of the present invention to provide a means by which clothing may be made more effective in its role in assisting temperature regulation, by: 1) providing increased heat exchange by means of reduced insulation (herein defined as “lower insulatory capacity”) of temperature sensitive sites (11, 16, 14)—reducing insulation of temperature sensitive areas not protected by “fat pads”; and/or 2) providing for increased vapor exchange by means of specific ventilation of temperature sensitive areas (herein defined as “increased ventilatory capacity”)—allowing flexibility for rapid increases in heat generation owing to facility for improved vapor exchange e.g. the loss of excess heated air or humidity, by, for example, convection and evaporation of sweat from the surface of the skin.