1. Material: memory foam
2. Features: close to the ears, good sound insulation, non-slip, elastic, breathable and comfortable
3. Thickness: hollow type: 2.5 cm, solid type: 2 cm
4. The sponge has good elasticity, good hand feeling and comfortable to wear
5. The sponge density is large, the sound quality is well controlled, the loudspeaker is louder and the bass is not scattered
6. Improved hardness, high stability in summer
