About this 3D model

We are living more and more difficult days as a result of spreading Covid-19 disease. We are limited in movements, but it's totally OK, we HAVE TO contribute. To support the shopping and other necessary public appearance, I re-designed the open source respiratory valve mask to an everyday use protector mask. It has a slot for exchangable filter (still under development). At present a folded piece of paper mask fitted into it, changed after every use. The straps are made of standard hair straps.