This is my second pair of Acorn slippers.  My first ones lasted for years and I washed them fairly often.  When I got my new ones I wondered why I didn't get them sooner because they are not expensive.  They are the most comfortable slippers out there -- kind of like memory foam on the bottom.  I have flat feet, cannot go barefoot on hard surfaces and these are perfect.  I like the thong style because I also have narrow feet and this feature keeps the slippers securely in place on my feet.  Would highly recommend these to anyone who loves a comfortable pair of slippers.