These earplugs were developed specifically for sleeping, providing ultimate comfort and maximum noise reduction. The unique 3D shape of the earplugs follows the natural contours of your ear canal, so they stay in place and don't cause pain for side sleepers. They're also made with a revolutionary sound-absorbing gel that provides maximum noise reduction for noise from your surroundings and snoring. Alpine Sleep Deep Earplugs offer a medium noise reduction value (SNR) of 27 dB, which means most noise from your surroundings will be reduced, allowing you to sleep through the night!