Crystal Guardian
Crystal Guardian makes custom silicone earplugs that fit to your anatomy, reducing volume on a flat level with a choice of filters.
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What is Crystal Guardian?
Crystal Guardian makes custom silicone earplugs that fit to your anatomy, reducing volume on a flat level with a choice of filters.
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Custom silicone earplugs fit to your anatomy, reducing volume on a flat level with your choice of -10, -15, -20, or -25dB filters. $100/pair.
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