Interesting, I didn’t know they had cloth wrappers for their Pickelhauben. Is/was that a common thing, to have cloth wrappers for helmets?
Edit: I did the tiniest bit more research and stumbled over what might be the reason, translated from this source:
During WW1, the Pickelhaube became useless. The metal reflected sunlight, meaning the soldiers couldn’t camouflage. The spike would often stick out of trenches, making them easier to spot.
As a result, a new helmet model was then introduced in 1916, but I guess, they had to get creative until those were ready…