*updated* My rating below was after wearing the shoes 5 times, after 7 times they loosened up a bit and no longer rubbed the heel. These are now my FAVORITE shoes, better than my Nobulls or Metcons. Definitely a shoe winner, just walk in! I lift a lot I used Nike Metcons, no bulls, no ammo, adidas lifters. So I tried many diff options. They were the most comfortable, lightest and easiest to fold of all. Flat and durable outsole. I'm complaining about some material going beyond the heel. I have worn them several times and they rub. I can work out but if you wear them for more than an hour blisters will start. I hope that after a while they wear more because I really like wearing them. But I've already done 5 workouts, each time with the same inflamed blister. If not, they would be my favorites. I'm disappointed but hopeful. I will update in a month.