24" x 100ft Reflective White Double Bubble Insulation Roll - Energy Efficient Radiant Barrier for Attics, Walls, Garages & Metal Buildings - Thermal Insulation for Home, RV & Commercial Use

A bit deceptive since it says Double Bubble in the title of the item, but make sure to look closely at the side cutaway view since it shows a single bubble layer. I'm sure it's still a good product, but NOT double bubble.