I already had the Vionic Gemma slippers and needed a second pair. The Adilyn slipper appears to be made EXACTLY the same as the Gemma, but quilted and with the little bow and tag. They fit me identically and feel exactly the same too. I have very low arches (not officially flat, I'm told) and when I first got the Gemma slippers they did feel odd but they saved my feet. I have plantar fasciitis on one foot and Morton's neuroma on the other and I was desperate when I got the Gemma's. I also have a problem with stinky feet and need to alternate the slippers for that reason, as well as so that I can wash them. I know they are not listed as "washable", but several reviewers reported washing their slippers with good results and I have washed my Gemma slippers successfully too. I put them into a sturdy lingerie bag and wash them with a load of laundry and then let them dry by an open window, in front of a fan, or next to the floor register when the heat's on. I have also discovered that they need to be washed less often if I alternate wearing them and spray them with Lysol (citrus scented). I expect the Adilyn slippers will wash as well as the Gemma's and it it really nice to have the 2nd pair.