French Adrian helmet and Goggles
The story of French equipment in WW1 follows a strict pattern of reusing old military stuff, then salvaging civilian stuff, then coming up with new military stuff. There were no such things as military goggles in 1915 so when gas attacks started to appear civilian driving glasses were immediately pressed into military service to protect French soldiers from being blinded.
Unfortunately these things were a very unreliable temporary decision, and an acceptable level of protection was only provided with the apparition of the M2 full gas mask on the frontline.