EUC worn for under 30mi but decided they aren’t for me. Sizing is SHORT. Last pic shows how they compare with Nike 7.5, they fit me more like a W7 so be aware. Best suited for someone normally in a 7 or 7.5 running shoe. Super fast, firm feeling, excellent for 10k-1/2 marathon. Could do a full if you’re a mid or forefoot striker. Highly beveled heel doesn’t work well for heel strikers. I loved these for uptempo runs and mile repeats! Excellent grip.