This is my first time purchasing Foamtreads and it was online so a lot of what I feel about these are based on how much this shoe did not meet my expectation.  First, my opinion is that a slipper is soft and has a soft lining, with a good non-slip sole.

These are sturdy shoes and are not soft at all.  There is no soft lining so socks really need to be worn with them.  The fashion of it is a slipper - the cloth design of it looks like a slipper, but it is too stiff.  Secondly, the thick sole provides great support but it is not the kind of sole my child is used to and it's hard for them to walk in them (they are 2).  So if your child is used to a certain kind of sole keep in mind these soles are very thick and high, like a member of KISS shoe.

I think this is a very well made, sturdy shoe.  I would consider buying this brand for other shoes, but not this particular "slipper" model.  It is probably mis-named and should be called a "slip on" shoe.