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  2. U-Mask Model 3: Product Information

How many times can I wash my U-Mask Model 3?

The new U-Mask Model 3 is hand-washable - you can hand-wash its filter up to 20 times up to a temperature of 40 degrees. The cover can be washed whenever you want at the same temperature.

As stated in U-Mask Model 3 user manual, the filter should be washed when deemed necessary, for example when it appears particularly dirty, stained or has a bad odour.