Attic Zipper (25" x 54" x 7") attic ladder insulation 33% d420 nylon / 33% heat reflective double bubble insulation / 33% polyurethane tarpaulin Made in USA Patent pending energy efficiency device made in the USA Engineered to reduce energy loss in houses with an attic ladder, scuttle hole, or knee wall door Provides easy access to attic spaces Proven to significantly reduce air flow through the attic entry Additional tests are currently being pursued in order to determine the R-value