This is my second pair of Acorn brand slippers, two very different styles, and I love them both.  These are so comfortable that I wear them around the house all day.  They're also really sturdy with nice rubber soles, so I've worn them on a couple of long car trips and a couple of short dog walks.  I keep thinking I'm going to wreck them, and that I'll be buying another pair soon, but after tons of wear, they seem to be holding up great.  The only thing I haven't done yet is wash them.  I wear them with socks, because they make my feet a little clammy without them.