Meanings of good insulator in English

That yarn traps a lot of air which makes it a really good insulator.

The snow, trapping minuscule air pockets between its frozen crystals, was a good insulator.

A lot of heat in the ship, and the double suit was a very good insulator.

Air is a good insulator because it's not very dense, so heat only moves through it slowly.

Those suits are a good insulator.

While the ordinary balloon envelope is a fairly good insulator against low voltage, it is unable to resist the high tension of atmospheric electricity.

These run into each other through an intermediate group, which are neither good conductors nor good insulators.

The best materials for the purpose yet discovered are gutta-percha and india-rubber, which are both flexible and very good insulators.

In other words, if light is an electro-magnetic disturbance, all conducting substances must be opaque, and all good insulators transparent.

The slatted shutters on the windows (there is no glass) allow air to circulate, and the teak walls are good insulators.

"I'll bet it's a good insulator."