Features: * Reflective insulation for use in a crawl space, attic, wall, metal buildings, and post and frame structures * Fiber free, environmentally safe, easy to install, and lightweight * Made up of seven layers, two outer layers of aluminum foil reflect most of the heat which hits them * Each layer of foil is bonded to a tough layer of polyethylene for strength * Two inner layers of bubble pack resist heat flow, while a center layer of polyethylene gives additional strength * No protective gear needed to install * Reflects 97 percent of radiant energy * -60 degrees F to 180 degrees F temperature range * 5/16 inch thick * 24 inch wide x 50 foot long roll What"s In The Box: * Reflectix BP24050 Bubble Pack Insulation - 24-Inch x 50-Foot