Aluminium Foil Bubble Insulation Sheets (also known as radiant barrier or foil bubble wrap insulation) wrapped in plastic.Key FeaturesMaterial Structure: Polyethylene air bubbles sandwiched between shiny reflective aluminium foil layers.Primary Uses: Thermal insulation for roofs, walls, lofts, and HVAC ducts to block radiant heat and control indoor temperatures.Properties: Lightweight, waterproof, and acts as a vapor barrier