This Do it extra strength indoor window insulation kit is twice as thick as standard film

So, it's i for applications near high traffic areas

Twice as thick to resist accidental punctures

And twice as thick for increased R-value

The crystal clear plastic sheet shrinks tight and wrinkle- with an ordinary handheld hairdryer

Easily installs on metal, painted, varnished wood or vinyl clad window frames with the double-face tape provided