Zip-N-Flip plastic/nylon/fabric Made in USA Layers of sealed air between high quality 97% reflective double bubble radiant barrier Installs in minutes and custom sizes are available on request! Saves on Energy loss through the attic opening! Average Savings up to 15% Seals out contaminants and allergins that are in your attic! Made of 80% recycled materials and fits most attic openings 25x55.