Mack’s Sound Asleep Earplugs.Mack†s SoundAsleepâ„¢ Soft Foam Earplugs are a natural, drug-free sleeping solution. Made with super soft, silky smooth Comfort Foamâ„¢, these are perfect for extended wear in situations where extreme comfort is paramount. The unique hollow end maximizes comfort, especially during sleep. Great for relief from snoring spouses, noisy neighbors, air travel, etc. Noise reduction - 32 decibels.