"In the Underworld your skin feels numb, there is no sense of heat or pressure...Remember that sound is muffled as if you were immersed in water, and normal vision isn't of much help either....
With the etheroscope you can see the nether things,
and we have also incorporated a Morse-Radio unit to communicate with the expedition.
Wear it at all times.
But be warned: do not -for any reason- remove the breather unit. Inhaling Ether will stupefy you forever, and trap your mind in the realm of half-light...."
This is the Etheroscopion (Etheroscope), made out of standard goggles and junk, and painted with acrylics. I only need to attack a leather strap to it, so it can be normally worn.
Unpainted version: unpainted goggles
Another view: goggles up
Yet another: goggles down
Side view: side