Inhalation mask for animals can be used:
for oxygenation of animals without placing them in a cell
aerosol
inhalation anesthesia
The mask is completely transparent, well soundproof and does not rustle "like a bag", so it does not add much stress to the animal when used.
It is easy to put on and take off (Velcro throat). The front wall opens completely with a zipper, so the animal can be stroked and calmed down.
The oxygen hose can be fed under the collar or not fully zipped. The carbon dioxide is extracted through several special openings.