COVID MASK - MK4

Hi, i've remixed the covid mask of Joan Pujades adding a little design and moving cotton disk internally.
PLA part and TPU part fit together by pins: when you fit them, then use hot air to melt and press internally.
Add silicone internally to seal.

This is my first attempt to 3D printing world, i start in quarantine days.. :)
Mask fit perfect, but sorry for any accuracy in design (first time in 3D drawing and printing)