After 3 knee replacements and a recent hip replacement, comfortable shoes are a must! I have worn one pair out that are so old no one even has them in their clearance department, or I would buy them again.. So I ordered these. They are the closest to comfy that I think I will ever get...They would be perfect if not for ingrown toenails, forgot to mention them).!..They have certainly helped my knees and hip! The arch and heel bed are just the best! Now to find some Vionic sandals. Oh yeah! The sizes vary a lot when you change styles!