Edit 6/18/18 - I have to edit my review after giving these an opportunity to break in. They're true to size and breathe well but they have an unusually thick heel. I've never purchased athletic shoes that felt this way. When I first started walking in them, it felt very unnatural - like I had a 2" block under my heels. I kept waiting for this effect to lessen as they broke-in but they've never become comfortable. I did some research and found there is a measurement called heel-to-toe drop. Well, these seem to have a very large drop. Swapping the insole helped some but doesn't erase the effect. I put about ~20 miles on these trying to get used to it but the significant angle still causes strain in my legs/hips and pain in my heel. For perspective, I'm a 45 year old male, average fitness and do a lot of walking, trail and street. Maybe if you're used to wearing heels you're body will be more tolerant of these but they are just not for me. I'm pretty bummed about it too because I'd heard so much about MOABs and how wonderful they were that I really wanted these to work out.