1. The insulation film is 5 mm thick and made of industrial polyethylene bubbles sandwiched between two layers of reflective aluminum metallized polyester film. No unsightly, non itchy fibers! Lightweight and durable insulation that is easy to install and maintain. It can be easily cut without scissors and is simpler to install than fiberglass. 2. VERSATILE: This product can be used under floors, in attics, and inside cavity walls to prevent heat loss and retain warmth. It even reduces noise pollution. The film is an aluminum foil used in the construction industry as a waterproof insulation system for walls, roofs, attics, ceilings, and floors. 3. It is moisture resistant, easy to handle, and requires no protective clothing or respirators for installation. Simple to install and maintain: just staple, nail, or tape it in place! 4. Reflects 97% of radiant heat and emits less than 3%. Saves energy by reducing the load on heating and cooling systems, keeping rooms warmer in winter and cooler in summer. Utility costs can be significantly lowered year round.