The Unity Mask PRO is designed to meet or exceed National Institute for Occupational Safety and Health (NIOSH) N95 filtration criteria while providing an air flow that allows for comfortable long term use. The Unity Mask PRO is designed to be printable by use of commonly available 3D printers; it is then assembled easily using additional readily available products.  The Unity Mask PRO is made up of four printed pieces, two headbands, and one layer of filter material.