I am a person with medium ears, but knowing that Chinese goods always run small, I ordered a large size. They have become very small. Eventually I pressed my ears against it, but not without effort. They have NO insulating materials inside, just a thin piece of material like microfiber cloth, but very thin. A strong wind will blow through, and the wind will also blow out of their ears. If you hit something, you will fall immediately. More Chinese crap to suck money from the American herd. Mu!