【Upgraded Earplugs & Effective Noise Reduction】Our upgraded earplugs feature a dual-layer structure that provides a high level of noise reduction, with an NRR of 40dB, offering superior sound blocking compared to standard earplugs with an NRR of 35dB. They easily block out all kinds of noise and provide comfortable hearing protection for extended periods. Note: These are not completely soundproof, but you can still hear necessary sounds like alarms, calls, and warnings, so you can use them with peace of mind. 【Excellent Fit】The ergonomic and lightweight design ensures that you won't experience any pain or discomfort in your ears, even after wearing them for a long time. They fit snugly in the ear canal, effectively preventing them from falling out, and providing greater stability. They can be used freely in various situations, not only for sleeping, but also for swimming, traveling, studying, reading, and working. 【Easy to Wear & Reusable】They are easy to wear; simply pull up your ear and insert the earplugs into your ear canal. Three sizes of ear tips (S, M, and L) are included, allowing you to change to the size that best suits you. They are made of soft silicone, which is gentle on the skin and antibacterial, and they are washable and reusable. 【Convenient to Carry & Wide Range of Uses】Comes with an earplug storage case, convenient for storage at home and easy to carry when you go out, so you don't have to worry about losing them. With excellent sound blocking performance, they are suitable for a wide range of places. Suitable for studying, deep sleep, stopping snoring, working, swimming, airplanes, mowing the lawn, concerts, etc. Especially recommended for those who want to protect their ears in noisy environments, those with hearing impairments, and those with sensitive hearing. 【Package Contents】Earplug bodies x 2 sets, Ear tips (S/M/L) x 3 sets, Foam ear tips (S/M/L) x 3 sets, 2-layer ear caps x 1 set, Aluminum storage case x 1, Leather storage bag x 1.