What household items are good insulators of heat?

* Air: Air is a good heat insulator, which is why it is often used in thermal insulation materials such as fiberglass and polystyrene.

* Cloth: Cloth is another good heat insulator, and it is often used in clothing to keep people warm.

* Wood: Wood is a relatively good heat insulator, and it is often used in building construction to keep homes warm in the winter and cool in the summer.

* Fiberglass: Fiberglass is a synthetic fiber that is made from glass. It is an excellent heat insulator and is often used in thermal insulation materials such as fiberglass batts and rolls.

* Styrofoam: Styrofoam is a type of plastic foam that is made from polystyrene. It is an excellent heat insulator and is often used in thermal insulation materials such as foam boards and sheets.

* Polyurethane foam: Polyurethane foam is a type of plastic foam that is made from polyurethane. It is an excellent heat insulator and is often used in thermal insulation materials such as spray foam insulation.