In the US, we use NRR (Noise Reduction Rating) to measure how well hearing protection works. The higher the number, the more protection you get. You might also see SNR (Single Number Rating) listed - that's the European standard.
PaArtyPlug Pro earplugs reduce noise by 21 dB (NRR), while standard PartyPlugs provide 19 dB of reduction. To put that in perspective: a typical music festival hits about 100-110 dB. With PartyPlug Pros, you'll bring that down to a safer level of about 80-90 dB. This protection is crucial because hearing damage can start after just 15 minutes of exposure to 100 dB sound levels, or from extended exposure to sounds above 80 dB.