Brand new, unused. Color: Black Contents: Includes 4 types of ear tips Shipping via Yu-Packet Post Mini 【Powerful Noise Reduction Function】 Made of soft silicone, with an SNR value of 50 dB, and built-in active noise reduction filters, it boasts high soundproofing performance. It blocks out most sounds, allowing you to immerse yourself in a quiet atmosphere wherever you are. Improves sleep quality, enhances concentration, and protects hearing. 【Flexible and Comfortable】 The soundproof earplugs are made of flexible silica gel and are designed to fit the human ear canal. You won't feel pain or discomfort even if you sleep on your side all night. The flexible silicone is gentle on the skin and has antibacterial properties. 【Washable and Reusable】 The earplugs are not distinguished between left and right. Gently pull them out of your ears. Made of soft, skin-friendly silicone material with antibacterial properties, they can be washed and reused, making them economical. 【Convenient and Versatile Storage】 Includes an earplug storage case and interchangeable ear tips (XS/S/M/L) - 4 pairs (3 pairs of silica gel ear tips, 1 pair of memory foam earplugs). Perfect fit even for small ears. With the earplug storage case, you don't have to worry about losing them. Suitable for deep sleep, studying, work, concerts, various sports, public transportation, etc. Recommended for those who want to protect their ears from noisy environments like live concerts, and for those with hearing loss or misophonia. 【Note: Memory foam earplugs have higher sound insulation. Sponge earplugs may feel a little pressure on the ears, so they are not suitable for long-term wear and can be used when higher sound insulation is required depending on the noisy environment.】