My husband has worn Ecco Fusion Slip-Ons for many years which have just been replaced by Fusion II which differ only slightly in the outsole design. He had them in both brown and black and yesterday we replaced the black pair with this new pair. He puts on Powerstep orthotic insoles against plantar fasciitis and size 43 (9-9.5) fits perfectly. Always comfortable, allows him to stand and walk for hours. He is currently recovering from back surgery and wears them to gym class instead of running shoes. They are so comfortable and don't slip. It's hard to find them outside of custom sizes that are either very small or large, but the $170 price point is good value considering how well they fit and how comfortable they are . Highly recommended.