Versatile: foam earplugs carry 38dB SNR, competent to block out loud noises for hearing protection, shut out distractions when sleeping and aid concentration when studying(br)Gentle and Comfortable: Made from non-toxic PU material, the light, dense, and tapered foam earplug ensures all-day comfort and protection in a wide range of working environments(br)Practical: The package comes with plentiful ear plugs, with the reusable 2-3 times, can protect your hearing for a long time(br)Convenient: Each set of earplugs come with a compact keychain travel case, convenient carrying and saving at anywhere(br) Screwed sealing ensures hearing protection earplugs from moisture, dust and debris(br)Multiple Uses: Recommended applications include studying, sleeping, shooting, flying, concerts, sports events, fireworks display, monster jam, woodworking, vacuuming, mowing, drilling and all noisy environments(br)