Double Bubble Insulation - Foil/Foil - 4' x 25' (100 sq ft)Double Bubble Reflective Insulation provides an effective way to manage heat and moisture in compact or unconditioned spaces. Its dual bubble core creates an insulating air chamber that slows temperature transfer and helps stop condensation caused by warm air meeting cold surfaces. This makes it a reliable choice for garage doors, sheds, RVs, vehicles, pet shelters, and other small structures that experience wide swings in temperature. For full vapor