Effective Noise Reduction: The ear plugs noise reduction have different noise-cancelling effects in different scenes (NRR 25dB to 33dB),soften the sound source and reduce noise while preserving the sound clarity and sharpness. These comfortable ear plugs for sleeping help preserve your hearing and provide you with some peace in a noisy world. Safe, Reusable & Washable: The earplugs are made of super soft food-grade silicone material, which do not stick to dust and have a delicate touch, with good elasticity and memory function, and the ear plugs for sleeping noise cancelling can be pulled at will without deformation. Designed to Fit The Ear: The ear plugs for sleep are designed to mimic the outline of the ear and fit the ear canal 360 degrees. Even if you lie on your side or turn over, The sleeping ear plugs not easy to slip off. Breathable and comfortable, no pain to wear for a long time.