Frost King 62 in. x 210 in. Polyurethane Extra-Large Shrink Window Insulation (2 per Pack)

The Thermwell Products Co., Inc. 62 in. x 210 in. Polyurethane Extra-Large Shrink Window Insulation (2-Pack) helps improve the R-value of a single-pane window by up to 90%. The insulation features polyurethane construction.

• Frost King window insulation kit for interior use
• Energy saving efficiency to increase R-Values up to 90%
• 2 sheets measuring 62 in. x 210 in.