A slightly scalloped edge to bind the edges. Not sure what difference this will make mechanically, but looks a bit fancier. A looped edge for hanging to dry in the shower. And a slightly beveled front flap. I might add in a little button to close it, but that might feel bumpy when showering.
This particular yarn (yes, same for both, different photography conditions. Need work there I guess) is acrylic, kinda thick, and should hold up well in the shower.