Mask

grabcad

A high-flow respirator with one-way exhaust reed valves, perfect for wrapping around drums electrostatic polypropylene, then securing them tightly with a rubber band. Next, apply a small amount of non-toxic glue to the filter frames' flange, thread the feed-through hole from inside out and screw on the retainer. Finally, stick some soft weatherstripping along the borders to achieve an even better seal on the face mask, and you're ready to go. This design should provide complete protection while allowing effortless breathing.