P1 THERMOBUBBLE product consists of a PE layer containing air cells with diameter of ø=10mm, one side covered with an 8µm MPET film. The MPET film reflects heat radiation while the air bubbles resist heat conduction and convection as well as acts as a sound barrier. P1 THERMOBUBBLE is a sound reduction & heat insulation material with high-strength, good tear resistance, and waterproof.