I have several pairs of the model Howser and a pair at the office, home, etc They have a durable slipper type upper with an actual soft bottom shoe sole with an actual Keen insole with arch support as well. If these didn't have a slipper upper look, I'd be wearing these everywhere, Hehe - The bottom sole looks to be the sole Keen was running in 2010 on many of their casual shoe line models, the Blvd. category is what they now call it on their main site. As many other members have stated regarding the warmth of the slipper/shoe, it is a comfortable type warmth it delivers, one that you kind of get spoiled to, Hehe - I personally like them enough to have several here and there and at the sale pricing they have had the Brown color unit in as of late, is a deal that can't be beat, especially for the high quality of these units at this very low pricing scale, thus why I have them everywhere, Hehe

I wear my standard shoe size that I wear with all my other Keen models, but as others have stated, they do seem to run just a smidgen short in length, this may be due to just the model but in any case it works really well for me as they are sort of roomy but roomy in a good way, they are not sloppy on the foot like most slippers and my heel doesn't slide up & down like most slippers and holds my narrow heels about the same as all my Keen model shoes. They are ultimately comfortable and also warm and comfy as many of the other members have stated. I hope Keen continues to make this particular model, I'm not aware of anything quite like it really and I suspect they do well with this model, as they kept this particular sole active for this model and considering all the colors they offer, leads me to think that it does well, so hopefully they'll keep it alive for quite a bit longer as well. If not I'll start stock piling more, Hehe

Overall; One of the best slippers I know of, if that's what it is, comfortable, warm and durable is the key in the Howser by Keen!