I love these slippers.  I have bought Tamarac slippers before and they last a long time and are very comfortable.  I wear slippers all the time in the house.  I never go bare foot in the house.  I also like to wash my slippers often!  On these I take out the insole piece on the inside (slides out easy).  Then I put the slipper and and insole in my large wash bag and wash it with the rest of my clothes.  I use vinegar in my wash that helps keep the colors from running.  The black has never faded.
I never dry slippers.  They dry within the day normally on top of the dryer or outside if its warm.  Because of the quality of these they will last me at least several years.  My other Tamarac slippers have lasted 3 - 4 years and still going.  I do wash them a lot!
I wear a 9 - 9 1/2.  I always go up in size and they fit perfect.