Nice slipper - very comfortable fit.  Not really a slip on as I adjust the strap over the top for a secure fit so they are comfortable to wear for extended periods.  The bottom is a little slick - it has rubber but also has a fabric covering on a portion of it.  I am hoping once I wear them for for a while, this covering will wear down and not be so slippery.  No arch support but plenty of room for my custom orthodic inserts.