Flents PROTECHS Quiet Contour Foam Ear Plugs deliver NRR 33 noise reduction with a comfortable hourglass shape ideal for sleeping, studying, travel, and loud environments. Made from latex-free polyurethane foam, they work best with proper insertion technique—roll tightly, straighten your ear canal, insert deeply, and hold for 15–20 seconds to allow full expansion. These reusable plugs effectively muffle steady sounds like snoring and traffic while still allowing you to hear important alerts.