Double Bubble Insulation - White/Foil - 4' x 75' (300 sq ft) Double Bubble Foil / White Insulation - 300 square foot roll (4' X 75') 96% Reflectivity, 0.04% Emissivity, 100% vapor barrier Lowers heating & cooling costs; Improves HVAC system High tear resistance Installs quickly and easily with a tape measure, scissors, and staples (DIY)