42L Portable Emergency Oxygen Bag PVC Reusable Oxygen Carrying Bag

Features：
It is made of PVC material, has no chemical action, and is highly waterproof.
The oxygen bag is mainly used for hypoxia, elderly ，pregnant woman , safe to use, convenient to carry and durable.
Lock the gas firmly so that it does not run out, and at the same time, you can adjust the speed of the oxygen output according to your requirements.
The amount of oxygen absorbed is adjusted with the size of the clip.
Exquisite workmanship, every detail is well done.