This is a kind of fine quality face mask replacement filtering pad, made of spunlaced viscose nonwovens, multi effect isolation, more safe protection. Breathable and skin-friendly, bringing you a safe breathing experience. Suitable for professional protective mask, disposable medical mask, ordinary civil mask. We recommended to replace it every 3 hours once, and the single piece should not exceed 4 hours. You can have a try.

Features:
Made of spunlaced viscose nonwovens, multi effect isolation, more safe protection.
Breathable and skin-friendly, bringing you a safe breathing experience.
More effective isolation and protection, more reassuring electrostatic adsorption particle.
Put disposable face mask pad on the inner side of common face mask, and can be replaced if there is peculiar smell.
Can effectively filter haze, dust and other fine particles, prevents second-hand smoke and automobile exhaust. 
Suitable for professional protective mask, disposable medical mask, ordinary civil mask.
Note:
We recommended to replace it every 3 hours once, and the single piece should not exceed 4 hours.
Help extand using time of face mask, approx 3-4 days.
If you are travelling on vehicles with high crowd density, we suggest you to replace the mask directly. 
Please use it after washing your hands, and the filter cannot be cleaned or reusable.

Specifications: 
Name: Face Masks Replacement Filtering Pad
Meterial: spunlaced viscose nonwoven fabric 
Item size: 120 * 90mm  / 4.72 * 3.54in
Package size: 120 * 90 * 50mm / 4.72 * 3.54 * 1.97in
Package weight: 100g / 3.53ounce

Packing List:
100 * Face Masks Replacement Filtering Pad