Built from high grade silicon rubber these are a great addition to your kit, your hearing is really important to your future playing and listening enjoyment so protect your ears with these plugs. If you're playing/rehearsing regularly you'll need a few spare pairs of earplugs about the place. The Hearos Extremes Earplugs 33dB Reduction come in a pack containing 28 pairs so its great for touring, long studio sessions with a full band or just every day use if you work in a high sound environment.
Here's what Hearos have to say about these plugs
With a Noise Reduction Rating (NRR) of 33, HEAROS Xtreme Protection ear plugs are perfect for blocking out unwanted or damaging noise. HEAROS Xtreme Protection ear plugs are perfect for sleeping, studying, attending concerts, traveling and participating and enjoying motor sports like NASCAR.