This model has been optimized for use in combination with a double filter on the drain valve of the EasyBreath Decathlon mask.
https://www.prusaprinters.org/prints/29343-double-22mm-draining-valve-adapter-for-easybreath-
The device is being tested as a PPE for medical staff.
It must be positioned under the protective suit.
Warning!
If you can not use any of these handmade adapters and filters, a certified device is certainly safer!!!
4 perimeter
support only the clip and first 7mm
The author remixed this model.