I have been buying Acorn slippers for about 20 years and they are the only ones for my feet now.  They are warm in the winter and so light weight you won't feel like you are dragging a brick around on each foot like some slippers I have owned.  The fleece on the inside is soft and hugs the foot making it fell so loved!  I have washed my other Acorn slippers in the wash machine on hand wash cycle . I place them in a clothes dryer set on delicate and dry them just enough to fluff the fleece and then finish drying them in room temperature air.  They come out looking like new too!  My former pair of Acorn slippers lasted about 9 years until the inside of the foot-bed finally wore out by wearing all the fleece away until it was leather like but I can still wear them with socks but who wants to do that?  The rubberized sole allows me to wear these outside even when it's wet and keeps my feet toasty and dry.  I highly recommend these slippers and they are worth every penny you pay for them, trust me!