Originally designed for the Swiss M1918/40 steel helmet, these covers served Switzerland well into the 1990s. Both styles are available, so make sure to choose which helmet you want these for. The older ones are heavy cotton and show more wear, whereas the M1971 covers are mostly in like-new condition.
NOTE: These are all used, so please expect wear normal with military use. This includes but is not limited to fading, tears, stains, and other various minor imperfections. That being said, I try to inspect each cover before they get sent to you, so you won't receive an unusable cover by any means.