Translation guide
Earmuffs are a clothing accessory worn over the ears to keep them warm in cold weather. In Japanese, the most common term is a loanword from English, but there are also descriptive native terms.
The learner wants to refer to the padded band worn over the head to cover the ears for warmth.
The most common and widely understood term. A direct loan from English 'earmuff', often shortened from 'イヤーマフラー'.
It's cold, so I'm wearing earmuffs.
A native Japanese word literally meaning 'ear cover'. It is less common than イヤーマフ but still understood, and can refer to various ear-covering items.
A less common loanword from English 'ear warmer'. Sometimes used in product names or fashion contexts.
These ear warmers are foldable.
These earmuffs are fluffy and warm.
耳当てを買おうと思います。
I think I'll buy some earmuffs.