Stable, relatively thick material: does not stick to the body while showering.
Can be good back and forth, does not flutter around in the area.
No unpleasant plastic smell.
A fine plain white shower curtain at a reasonable price.
To maintain: PEVA shower curtains can not in the washing machine, I always keep soft in the bathtub with water and vinegar, then power wash or brushes, if you do that on a regular basis (and after every shower pulls apart the curtains and the bathroom vents) then the Excellent.