Additional Details ------------------------------ Bullet point: One layer closed-cell foam bonded between two layers of highly reflective metalized aluminum polyester film. Industrialized strength, lightweight yet durable insulation designed to hold staples without tearing. Does not compress, collapse or disintegrate. Reflects 97% of radiant heat, emits less than 3% of heat, Class 1 / Class A fire rated radiant barrier that has passed the ASTM E84 test ASTM E2599 Product description: US Energy Products (AD3) Reflective Foam Insulation Shield, Heat Shield, Thermal Insulation Shield Radiant Barrier 16"x25ft 3mm Thick (AD3) EXTREMELY EFFECTIVE - reflect 97% of radiant energy, perfect RADIANT BARRIER. VAPOR BARRIER -Unaffected by humidity and moisture, can be used outdoor/indoor. SOUND BARRIER - excellent soundproofing material. SUPREME QUALITY - 3mm closed cell polyethylene FOAM (not a bubbles) sandwiched between PURE ALUMINUM (not a polyester film) on both sides. Easy to install, easy to cut and easy to clean, Strong but lightweight. FIRE RATE - Fire rate Class 1 / Class A, NON TOXIC - will not irritate skin, eye or throat. Non allergic.