Hush Earplugs
Hush not only uses memory foam to provide passive noise cancellation. It can also play soothing background noise to block out more unwanted sound and help you relax. Pick from different background noises using its mobile app.
Crowdfunded projects pose a degree of risk for buyers, so be sure to do your research and fully read the seller's detailed description and production plans before plunking down your hard-earned money.
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