MOQ:2000pcs fit for high temperature, high humidity and fuggy sites. dual filter reasonable price exchengeable filter Protects against gas, smog, paint and dustComfortable design is in accordance with human factors engineering Light weight, suitable for long wearingMaterial: PVC, PC,active carbon.Inner packing: Polybag, header card, sliding card, color boxFlexible and multi-color to chooseOuter ...