I can't remember the name of the product but a local roofing supplier will know, since the product is widely used in commercial buildings.

It is probably bubble wrap with a radiant barrier foil facing. Manufacturers often make outlandish claims for its performance claiming the energy savings of the radiant barrier can be expressed with an equivalent R value which is a fantasy. It can be effective as a radiant barrier and a vapor barrier if installed properly but it's insulation value should be ignored. It essentially reduces condensation in steel buildings but the price alone should tell you it is a scam.

Here is a link that might be useful: bubble wrap disguised as insulation