【Upgraded Earplugs & Effective Soundproofing】: These earplugs provide effective sound insulation and noise reduction through a dual-layer design, with a noise reduction rating (NRR) of 28dB. They easily block out all kinds of noise, offering comfortable hearing protection for extended periods. Note: These are not completely soundproof; you can still hear necessary sounds like alarms and calls, so you can use them with peace of mind. 【Comfortable Fit】: Ergonomically designed and lightweight, they won't cause ear pain or discomfort 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. 37-32-13