The Frost King Indoor Window Insulation Kit (4-Pack) provides shrink film and tape to insulate 4 standard sized windows. Shrink film on windows helps increase their R-Values up to 90%. This provides energy-saving efficiency. Shrink Windows also stops drafts.

*Disclaimer: Some items have been previously opened and some packaging may show signs of damage wear and previous handling. All items have been tested, inspected and are marked on package.