ThermoClimb Attic Stairway Insulator is fabricated to provide your home with protection against energy loss. Constructed from industrial-strength polytextile metal coated fibers for effective radiant barrier insulation. It is also manufactured with a 3.8 R-factor for higher thermal resistance which increases the thermal efficiency of the attic by over 10 percent. The adjustable Velcro straps allows you to fit this insulator on stairs of different sizes while the zipper opening provides easy access and allows effortless cleaning. With all these features it is guaranteed to save you money on your utility bills, making this product cost-effective.