The best there is. I used it when my mother went to a public hospital for a health issue (not COVID) and I didn't catch COVID. You need to wear another single-use mask on top of it. The only problem is that it tightens around the head with the elastic bands and you need to change their position every hour (a little up, a little down)

An excellent mask with a valve for those who are healthcare professionals but also for those who wear glasses and have difficulty in their movements because the lenses of the glasses fog up. Through the valve, during exhalation, the air exits towards the environment and no fogging occurs on the lenses of vision glasses or steam, the air permeability is FFP3 (red strap), there are also FFP2 available. The mask is cleaned on the outer part and on the inner cushion that comes into contact with our skin with a cloth soaked in alcohol or isopropyl alcohol solution or alcohol.

ATTENTION: Masks with valves only protect the wearer but not those around you because they do not filter the exhaled air from you, therefore, if you enter a healthcare facility and generally in an enclosed space, you must also wear a fabric mask on top to cover the valve, otherwise, if the supervisors are aware, they may prohibit you from wearing it and recommend you to wear a surgical mask or a fabric one.