It is possible to enjoy music with BGM feeling without obstructing the environmental sound. The exterior looks soft with silicone.
An ear cuff type that clamps in the cartilage part beside the ear and keeps it.
Unlike an earplug like a canal type, it does not feel a feeling of pressure or pain even when used for a long time, and has little stress. The merit of the ear cuff type is to reach the ears firmly without shutting out the environmental sound. Since you can know the sound of cars and trains, warning sounds of transportation, etc., the safety when using outside is enhanced. It seems that it is sold out so far.