The shoe is completely made of felt, with the material at all points is approximately equal to "thick". That would be the only downside. I would have liked a slightly thicker sole. This is about the strength of the other shoe, causing the slipper something "like a sock" wears. As a result, it does not bother me, so I have to keep him.
To the ABS is to say, there are some rubber points on the soles. The "anti-slip" effect, however, is smaller than I expected.
