The invention discloses a garment which has an effect of preserving heat when worn normally and has an effect of cooling when worn inside-out. The garment consists of three materials, upper and lowerlayers are nanoporous polyethylene substrates, a double-layer radiation interlayer is arranged between the two substrates, and the interlayer is composed of an ultra-low emissivity aluminum powder coating layer and an ultra-high emissivity transition metal oxide ceramic powder coating layer; the thickness of the nanoporous polyethylene substrate layer on the side of the ultra-low emissivity aluminum powder coating layer is 12-20 nanometres, a coating layer with a thickness of 0.15-0.25 nanometre is formed, and the normal temperature infrared radiation rate is 0. 3-0.5; the thickness of the nanoporous polyethylene substrate layer on the side of the ultra-high emissivity transition metal oxide ceramic powder coating layer is 25-35 nanometres, a coating layer with a thickness of 25-45 nanometres is formed, and the normal temperature infrared radiation rate is 0.91-0.93. The garment has the advantages that the double-mode effect that the garment which has the effect of preserving heat whenworn normally and has the effect of cooling when worn inside-out is achieved by the double-radiation interlayer, and the energy consumption of a constant temperature system is saved.