So I got these in February, and while at first I LOVED the cushion of the memory foam and the overall fit, I'm disappointed that - here in April - the memory foam has flattened out and the insole has gotten a little smelly (and I DON'T have smelly feet).  I've only worn them in the house - usually with socks on, but the wool felt insole has flattened out and started to smell a bit.  You can't remove the insole and I'm assuming that because it's wool, you can't wash them in the machine (because there are NO cleaning instructions with the slipper - not even on the materials tag).

So I'm disappointed that at this price, they've held up about as well as a pair of Dearfoams or Isotoners (which on average cost about $15 at most stores).  Not the kind of lasting performance I'd expected.