The review I wrote for the filter on 20/3/23 is available through my profile as well as from the following short URL:
https://shorturl.at/zIcx6
The title (product description) has changed and the product appears as unavailable. This product is 100% the same, so for convenience, I am providing the text of the original review without the accompanying photo.

Origin/authenticity.
No comments.

Fit in the bin.
If the filter does not fit correctly in the bin even once, the vacuum cleaner will be thrown away in 10 minutes instead of 10 years. The filter included with the vacuum fits correctly and "locks" in place without needing to be touched by a person, under its own weight. If you need to apply more force than what is needed to bend a coffee straw, then the filter is definitely being placed incorrectly. During the fit check, this filter required more force as it did not click into place otherwise. Perhaps over time it will take the shape of the bin more correctly and fit more easily. It should be noted that there were no measurable differences on the filter regarding the fit in the bin. Like the original, this filter has a manufacturing defect (see circle in the photo) in the frame that fits in the bin. Use a small knife to carefully remove it.

Build quality.
Compared to the original filter, it was found:
A) two grams lighter.
B) 3 millimeters shorter.
C) 0.2 millimeters thinner filter.

Pollutant retention.
This filter has much greater airflow than the used filter I have. This is attributed 90% to the pollutants that have remained in the old filter, while 10% is attributed to the thinner filter used in the construction of the replacement. Greater airflow equals more pollutants entering the motor and gradually destroying it.

Final conclusion.
Replace your filter only if it is damaged, or if after any cleaning, the suction power and air expulsion are extremely low. In this case, carefully place the new filter in the correct position and try to see if you notice a difference. If you do not notice any differences, then the vacuum may need servicing or replacement. If you notice significant differences, then check that the filter is properly installed and there are no gaps. The product receives 5 stars as there is no alternative solution or other product for comparison. Purchase price €3.39