MOLDEX's Pura-Fit is a high-performance earplug. The soft, elastic polyurethane and tapered design create a comfortable fit and excellent seal. With an NRR of 33dB (industry-leading), it effectively blocks external noise! It selectively cuts out disturbing sounds. By wearing earplugs while sleeping, they are useful for improving sleep quality, as well as for dealing with pet noise, construction noise, snoring, and enhancing concentration. [Recommended Use Cases] Sleep, Snoring, Improved Sleep Quality, Factories, Studying, Pet Noise, Noise Reduction As this is a hygiene product, returns are not accepted. Immediate purchase is welcome.