Glycerin Flex Running Sneaker

[This review was collected as part of a promotion.] Several flex's in and still the best running shoe I have ever ran in. I love how light it is and how it feels like nothing is there. I find my case for tracks higher when I run in the flex compared to other shoes, I have primarily ran in standard glycerin (which I also like) for the past couple of years not including workout shoes. I haven't bothered switching to workout shoes since having these as they return speed when I need it and don't feel heavy. I used to live the levitate and mourned when they got changed as I didn't like them. The flex is even better. I do find they take 25 or so miles to warm up, They aren't uncomfortable before then, just a bit of a stiffer run.