Heavy-duty noise reduction - earplugs made of flexible silicone material with noise reduction of up to 28 dB (signal-to-noise ratio) comfortably and elegantly block irritating noise. Create an exclusive quiet space at any time, improve sleep quality, focus more, and travel easier without stress. Earplugs are certified to effectively protect your ears from harmful noise. Extreme comfort - This reusable earplug is light and flexible in silicone and can be worn day and night even when sleeping on your side. Perfect for sleep, concentration and several other occasions - earplugs reduce noise immediately and effectively protect your hearing for sleep, concentration, relaxation, travel, commuting and noise sensitivity. Ring-shaped earplugs are easy to clean and durable. Easy to use - just insert earplugs and rotate firmly to enjoy your favorite volume. When used correctly, the earplugs will not stick out.