DescriptionAnti-Pollution Mouth Mask Anti-Dust Cycling Mask Activated Carbon Filtration Exhaust GasThis sports mask has a high-efficiency filter layer, soft earloop, the valve can be replaceable. It can be applied in electronic manufacturing, dust-free workshops, catering services, food processing, environmental cleaning, etc.Features:- Simple design, lightweight and portable. Suitable for most people.- With adjustable HOOkLOOP, this mask is not easy to fall off.- Fit comfortably under helmet. Avoid inhalation of automobile exhaust when youre riding.- Good Protection against gases, smells, PM 2.5, second smoke, pollen and particulates.- Suitable for outdoor activities such as running, jogging, biking, cycling, riding, hiking, skiing, snowboarding.Note:- The cover of mask is washable. Please take off the filter when washing( the activated carbon filters cant be washed).- Under normal circumstances, the filter is recommended to be replaced every 30 days. If the the mask used frequently, please replace the filter when it became black or be damaged.Specifications:Package size: 210 * 200 * 35mmPackage weight: 54g