This maks protects the face from any small particles that could potenitally enter into the human body, or stay on a humans face. This model is made to be machined on a CNC, so more can be made at a faster pace. The Sheild file has a hood that can be bent, depending on the material thickness, which should be either 0.0625 or 0.03125, you may not need to use a heat gun. The Band is made out of 0.250 plastic which is bend into shape using a heat gun and a mold. This mask was modeled similarly to the Prusa mask, but was modified so it would be able to be machined on a CNC router.