The gag is on this product in the foreground. The practical application opens into a fairly short length of the shower curtain (necessarily measure beforehand!) And ends in a quite annoying, penetrating kind of typical shower curtain Blanket Syndrome. Do not be surprised therefore if this shower curtain due to the material and density, the butt sticks faster than others.
The permeability of water is terrible, what can be considered positive in this case :-)