Definitely half size up. I usually wear thick socks but not for this sneakers. I have pains around my pelvis after running but not anymore after wearing them. Worth the price!

Very fast shoe that is an improvement on the previous Streakfly with addition of the carbon fiber plate. The responsiveness is great and I can tell that when I race in these I'll be primed for a PR. Be sure to lace tight as the tongue does have tendency to slide to the side slightly. I would have preferred if the material in the heal was sturdier, but I understand this shoe is all about weight. Great shoe, put them on and fly!

They are comfortable and light but however the plate tore off on me within my 2nd or 3rd run, I didn’t even hit 5 miles with them. Durability is trash.