Features: 1.New and high quality 2.Reduce noise, concentrate, hearing protection, etc., are you at home, dorm, classroom, the place such as aircraft, ships, factories, construction site from the good helper of noise interference. Swimming can also be used as a earplugs. Problem efficacy: (NRR) 24 db noise values, the Christmas tree outline design, the anti-fouling processing, cleaning, installed with health, safety, soft and comfortable, sound insulation effect is good.
