High Anti-Leak, High Air-Permeability, High Filtration Provide full protection. Upgraded anti-leak and protection. Patented anti-leak side films, effectively prevent side leaks. Widen ear bands reduce the feeling of being tied up. Excellent elasticity ear bands fit the face snugly, reducing side leaks. 1.Size: for adult 2.Available for 3 layers 3.OEM/ODM/Customization are available
