Duct insulation is for both heating and air conditioner ducts and is self adhesive foil and foam. Two layers of polyethylene industrialized air bubbles bonded between two layers of highly reflective metalized aluminum polyester film. Industrialized strength, lightweight yet durable insulation designed to hold staples without tearing. It's non-toxic, non-carcinogenic, fiber-free, safe to handle and does not require protective clothing or respirators to install. It could save energy by reducing the stress on heating and cooling systems, keeping your home warmer in the winter, and cooler in the summer. It can reduce utility bills substantially all year round.