I would assume it's for outside, as the CDC has changed its guidance on outdoor use, as we can see from this earlier, archived, guidance page[1]; this later gui

I would assume it's for outside, as the CDC has changed its guidance on outdoor use, as we can see from this earlier, archived, guidance page[1]; this later guidance[2] which is more relaxed; and in particular this order[3]: > The Centers for Disease Control and Prevention (CDC) issued an Order pdf icon[PDF – 11 pages] on January 29, 2021 requiring the wearing of masks by people on public transportation conveyances or on the premises of transportation hubs to prevent spread of the virus that causes COVID-19. This Order was effective as of 11:59 p.m. February 1, 2021 and was published in the Federal Registerexternal icon on February 3, 2021. CDC will be amending this Order as soon as practicable, to not require that people wear masks while outdoors on conveyances or while outdoors on the premises of transportation hubs. [1] https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover-guidance.html https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-si... [2] https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/about-face-coverings.html https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-si... [3] https://www.cdc.gov/quarantine/masks/mask-travel-guidance.html https://www.cdc.gov/quarantine/masks/mask-travel-guidance.ht... Edit: managed to muck up the links, fixed.