When I held this pillowcase the first time in hand, I was disappointed. With every movement he made but already arge crackling. So the manual fix ... read wash before first use, it said. With healthy skepticism I did that and was rewarded. The crackling had absolutely disappeared. Now we have these relationships already tested some time and regret buying any circumstances. Nothing comes by, but you do not sweat, so absolutely recommended. PS: We bought these relationships because of our expensive 2-chamber pillow repeatedly came through very small springs and we did not want to play relate every time Frau Holle the beds. ;)