He continued, “If you are going to wear a surgical mask, you’ll want to pull it down, press it against your nose and squeeze. The best way is to make sure it’s tight around your nose and face, then wrapped around your ears. Sometimes we see people wearing masks below (their nose, just covering their mouth) which is incorrect, it needs to be around your nose.”
Source : https://www.distractify.com/p/what-type-of-mask-is-recommended-by-cdc