High Quality MB Filter mask that is light in weight and easy to breathe in. This mask is made up of non-woven manufacturing method that uses thermoplastic polymers and radiates extruded through nozzles which is the key filter used for in air purifier hepar filter KF mask etc. MB Filter masks by Nature Factory are ideal to be used in any weather as they are made up of high quality material. Features: 1. Easy to Breath masks that does not cause suffocation after long time. 2. Soft earring strap so that your ears are not stretched and does not cause pain. 3. Light and Soft Mask made up of high quality material. 4. Contains three filter structure : MB filter + two-sided nonwoven fabric *