... using roof,floor underlay. Refelective sheet or insulation fabric is made up of Alu film or Metalized ... breathability , soft handle, super reflectivity about 97%,heat insulation, Excellent performance breather membrane ,Breathable underlay for roofing, ... ,floor underlay,construction,wall ,building to heat insulation, thermal insulation,acoustic effect,shockproof,dampproof.And other packaging material ...