The structure of Ear bone vibration headset is very soft, I guess that it should be silicone rubber.
耳骨振动耳机的结构是非常柔软的，我想，它应该是矽橡胶 。
2
Besides the sound insulation set, the bass of the cushion, the feeling of the rubber, you must choose the right size for your ear then you can get the best sound quality.
除了隔音设置，低音垫，橡胶的感觉，你必须选择你的耳朵大小合适的，那么你就可以得到最好的音质。
3
An object made of a soft, pliable material, such as cotton or rubber, and fitted into the ear canal to block the entry of water or sound.