3M | 30pairs】3M Earplugs Sleep Special Noise insulation Industrial Factory Student Comfortable Sleep Noise insulation noisereduction.

Products includeEarplugs: 111030 pairsFree storage box2pcsEarplugs(2pcs/pair)Detailed descriptionSmooth surface, dirt-resistant, more hygienicEarplugs are easy to rub, easy to wearBullet shape design, comfortable to wearSoft hypoallergenic polyester foamNominal noise reduction value (NRR=29 dB SNR=37 dB)Product Reminder!3M Anti-Noise Earplugs reminds you that it is recommended to change the earplugs every 1-3 days, the exact frequency of replacement can be decided according to the actual situation.If the temperature in your receiving location is cold, which will cause the 3M earplugs to become hard, please place the earplugs in a warm room to warm them back up, or use the temperature of your hand to make them soft again. After the product is back to soft, you can wear it normally.