I've been looking for a good pair of supportive house slippers for years. I have high arches, but shallow feet and most all orthopedic shoes are too wide for me. But I must wear highly supportive shoes, or I get plantar fasciitis. I was so excited to receive these shoes and note the amazing arch support. And find that the Velcro closure tightened enough to make these secure across the top of my shallow feet! That adjustability is also helpful for wearing these both with and without socks. After reading reviews on this brand running a bit small, I ordered a size 40 though I am a size 39 (or 8.5). The shoe slides around on my heel, but much of that can probably be attributed to these being a tad long/not buying my true size. At least that provides some room for wearing socks too. I can hardly believe these are MACHINE WASHABLE after removing the foot beds. WONDERFUL! This is a great shoe that I highly recommend. I will be wearing them at home every single day in the cooler months.