Filters size: 4.8" across x 3.1" high OR 12cm across x 8cm high.
Five layers Filter Material: 2*Anti-sticking cloth, 1 *Filter cloth, 1 * Activated Carbon and 1 * Efficient filter cloth.
Safety Protection – This is ideal to protect your mouth and face from Dust, Haze, Allergies, Pollution, Ash, Pollen, Gardening, Crafts, Vehicle Exhaust, Woodwork, Pollen Allergies, and Fumes
We suggest changing the filter every 3 days.