$ 4.99 $ 9.99
1. It is not recommended to use this product under the condition of low oxygen, heavy air pollution, poor breathing or during sleep.
2. For patients with severe asthma or other severe respiratory diseases, please use them with caution.
3. Please use the masks properly. Do not modify or misuse it at will to avoid serious consequences caused by improper usage.
4. Store in an environment with a temperature of -20C to 38c and the relative humidity of the environment shall be lower than 80%.