This is a remix of the OESH elastomeric respirator, which is an excellent design with adjustable fit that can be sanitized and reused repeatedly.  Our version can be printed on a small printer, since the original requires a larger print bed than many people may have at home.  It also has a different strap design and includes a stencil for cutting filters.  This respirator comes in three sizes: small, medium, and large.  The medium is likely to fit most adults, with the small fitting children and smaller women, and the large fitting larger men.