Final answer:
A hard rubber comb is the best for using with thermal irons because it is a good insulator of both heat and electricity.
Step-by-step explanation:
A hard rubber comb is the best for using with thermal irons because it is a good insulator of both heat and electricity.
Thermal irons are used to style and curl hair, and they produce heat to shape the hair. Since rubber is a poor conductor of heat and electricity, it does not transfer the heat from the thermal iron to the comb, allowing the comb to stay cool and safe to touch.
This makes it an ideal choice for safely using the comb while using thermal irons.