DetailsSoft Comfortable Fit. SparkPlugs® earplugs are made of extra-soft, extra light foam. Their tapered shape fits easily in the ear canal, and seals gently and snugly without pressure. They’re so comfortable you’ll forget you’re wearing earplugs. Independently Tested: NRR 33. SparkPlugs® earplugs offer a high NRR 33, making them suitable for most noisy environments. So, while they look like fun, they provide serious protection.
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