I own about eight pairs of
Birkenstocks and I bought these because I wanted a pair with a closed back for clinic. I love them. I have tried a lot of
comfort shoes and my favorites are Birks,
Keens, and
Earth shoes. The usual excellent
arch support and wide toe box. The only thing would be that the back rubbed a little for the first two days, so just make sure you have longer
socks, and the whole shoe was a bit loose after a couple of days, like it had stretched out. I normally wear a 39 regular for open toed Birks or 40 narrow for closed toed, and these were a 40 regular because I was unsure about the tightness at the back.