Here are some common examples of insulators:
* Air: This is why double-paned windows are so effective - the trapped air between the panes acts as an insulator.
* Fiberglass: Commonly used in insulation for homes and buildings.
* Foam: Used in many applications, like insulation and packaging.
* Wood: A natural insulator, good for building homes.
* Rubber: Used in many applications, like electrical insulation and gloves for handling hot objects.
* Plastic: Widely used as an insulator in various applications.
* Wool: A natural insulator used for clothing and blankets.
* Cork: A natural insulator with excellent thermal properties.
The opposite of an insulator is a conductor, which allows heat to flow easily through it. Metals are good examples of conductors, like copper and aluminum.