Two layers of polyethylene industrialized air bubbles bonded between two layers of highly reflective metalized aluminum polyester film. One side is reflective metalized silver foil. The other side is also reflective foil coated with a waterproof Black Vinyl Finish. Industrialized strength, lightweight yet durable insulation designed to hold staples without tearing. Does not compress, collapse or disintegrate. Reflects 97% safe to handle and does not require protective clothing or respirators to install. Easy to install and maintenance free, cuts easily with utility knife or scissors and installs easier than fiberglass. Simply staple, nail or glue into place! No mess, and no itchy fibers! Not affected by moisture or humidity. Saves 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. Made in USA Meets all Intl and USA Fire Codes 4FT WIDE X 50FT LONG Additional Details ------------------------------ Bullet point: Two layers of polyethylene industrialized air bubbles bonded between two layers of highly reflective metalized aluminum polyester film. One side is reflective metalized silver foil. The other side is also reflective foil coated with a waterproof Black Vinyl Finish. Product description: Two layers of polyethylene industrialized air bubbles bonded between two layers of highly reflective metalized aluminum polyester film. One side is reflective metalized silver foil. The other side is also reflective foil coated with a waterproof Black Vinyl Finish. Industrialized strength, lightweight yet durable insulation designed to hold staples without tearing. Does not compress, collapse or disintegrate. Reflects 97% safe to handle and does not require protective clothing or respirators to install. Easy to install and maintenance free, cuts easily with utility knife or scissors and installs easier than fiberglass. Simply staple, nail or glue into place! No mess, and no itchy fibers! Not affected by moisture or humidity. Saves 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. Made in USA Meets all Intl and USA Fire Codes 4FT WIDE X 50FT LONG