... 80% external heat resist thermal shock Double Bubble Insulation materialAL/Bubble+Bubble/AL without fireproofcolor: silver ... 3.Heat reflection, heat insulation, sound insulation, anti-radiation, anti-vibration, and shielding; 4.Moisture barrier, sun-proof, waterproof ... preservation, energy saving… 5.Summer: moisture barrier, sun-proof, heat insulation, saving energy consumed by cool air conditioning ...