Product name:K88V Product introduction: Fabric:Soft non-woven cloth, soft non-irritating to skin Exhalation valves on each half of the face mask reduced hot air buildup and easy breath in hot/humid environments, suitable to long time wearing comfort. The filters is made of high efficient melt blown web which resists dust and oil-free particles and can be changed Adjustable nose piece provides a custom seal for different facial size Excellent water repellent and air permeability Convenient to use Recommended applications: cycling