Breathing valve device: No
Filter effect: anti-pollen, dust, high efficiency filtration, smooth breathing
1. is skin-friendly, soft and not easily deformed.
2.Washable, reusable, economical and durable.
3.Isolation of smog and dust can reduce the risk of cancer.
4.Simple and solid color design, fashionable and generous, it is a must-have item for hipsters.