Product Description
The gasket has a mask that is perfect for wearingVERY sensitive Visual flow indicator easily letting you know the correct speed breatheTIGHT AIR Seal around nose and mouth insuring no wasteALL of our products are produced in a strictly sterile and dust-free environment which are sterilized and sealed immediately after production to ensure the cleanness and safety of the productsTHE BEST AFTER-SALES SERVICE： If you encounter problems while using please don't hesitate please contact us as soon as possible we will reply you the first time after receiving solve your problem and make you happy Shopping and experienc
