This is by far the best shield/protection for thermal units.
The honeycomb mesh can stop a BB (airsoft) traveling at more than 400 FPS (tested at point blank), and still having close to no impact on the sensor image quality
This is the best protection at the best image quality you can get!
Mesh made out of stainless steel to resist weather harsh conditions, and the suport is made of an high tensile strength polimer that wont break easily.