Double earplugsSmall ear canalSoft sound insulationSleepAseptic PU cottonWashableNoise reduction

Description

Through multiple filters to achieve three-dimensional noise reduction comparable to noise-canceling headphones sound insulation effect, multiple structures to achieve that is breathable, but also in the structure of the clever consumption of frequency sound waves so as to avoid high speed trains, airplanes, the specific environment caused by tinnitus, piercing the ears of symptoms