Originally Posted by amma
I wouldn't like those nubs... I wonder if they have these without them?
I wonder if the nubs would be like Croc shoes and almost have a massaging effect. ??? I think the web site said it increases circulation, so it might be possible. I'm not sure how it would make you use core muscles though, it doesn't seem like it'd be round enough. Of course, I have been known to lose my balance on the exercise balls, so maybe this would be safer. tee hee