Pack of 10 Reusable Mask Filters

Made of 5 layers of protection. Stops 65% of particles. Good protection for : Pollution, allergies, travel, sensitive lungs, dusty outdoor work. Good for 3 days if worn full time otherwise change after 5 days. Fits in the pocket provided for this purpose in the Swiss Mobility. masks. Masks sold separatly. Package of 10.