Mack's High Fidelity earplugs are the same as ER-20s. They use a unique tuned resonator and acoustic resistor to reduce all sound evenly across the frequency range.
As a result, speech and music remain clear, but quieter - as if you've simply turned the volume down.
Noise Reduction Rating: 12dB. Supplied with removable cord.Please note:
this product may be supplied flat-packed to save you additional shipping costs.
One size. These earplugs are suitable for all music events, bar staff etc.