24" x 50', Square Edge Roll Double Bubble, Reflective Foil Insulation. Reflects Up To 97% Of The Radiant Heat With An R-Value Of Up To 14.3 Depending On Application. Excellent Vapor Barrier For Below Grade Installation. Class A/Class 1 Fire Rating, Approved By BOCA, ICBO, SBCCI CCMC, FTC-Compliant, Is Non-Toxic, Non-Carcinogenic, Lightweight & Can Be Installed With Scissors, Staples & Tape. Hundreds Of Applications: Wall, Roof & Basement, Garage Door, Camper, Metal Or Pole Barn, Window Coverings, Stables, Hatcheries, Etc