I bought a pair of ER-25 PROTAC Pianissimo 3 months ago.
Price: € 159 all inclusive (fingerprint + molding + filter) in Audika
12 month warranty with the option to change free
during the first 3 months.

The prostheses are comfortable to wear even over a long period.
The filters are almost transparent and can work.
Remains to wear over time ...

Values ​​of the attenuation:
125 Hz = -22.6 dB
250 Hz = -24.0 dB
500 Hz = -26.4 dB
1 kHz = -24.4 dB
2 kHz = -24.4 dB
4 kHz = -27.5 dB
8 kHz = -25.4 dB