Are masks better with exhalation valves?

The exhalation valve can help reduce the exhalation resistance and facilitate the discharge of hot and humid air in the outlet cover. It is comfortable and suitable for high-strength operators or in a sultry environment. Masks with exhalation valves are not allowed during surgery.

How to wear: The mask is equipped with a headband type with two upper and lower straps, and the earband type with two straps on the left and right. The earband style is designed to meet the wearing habits of Asians and has a small impact on hair style, but it is easy to compress the root of the ear, which is not as comfortable as the headband style. There is also a neckband design, which can both solve the pressure on the ear by the earband and the inconvenience of removing the cap to remove the mask.