1. Material: protein
2. Soft and comfortable, do not feel tired when worn for a long time
3. Sound proof, good air permeability, good elasticity, not easy to crack
4. Easy to replace
5. Good quality and long service life
2. Soft and comfortable, do not feel tired when worn for a long time
3. Sound proof, good air permeability, good elasticity, not easy to crack
4. Easy to replace
5. Good quality and long service life