Earflap

noun

1. A flap attached to a cap that may be turned down to cover the ears.
2. The hanging flap of a dog's ear.
3. one of two flaps attached to a cap to keep the ears warm. On some hats the earflaps may be adjusted or tied to the top of the hat, and lowered when needed in colder weather.
4. either of two flaps attached to a cap that cover the ears
5. one of two flaps attached to a cap to keep the ears warm