Figure 1.
(a) 3D-printed face mask ear protector (EP) distributed to survey participant (b) 3D-printed face mask ear protector (EP) worn by model
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.