This was my first barefoot running shoe. I'm not a big runner, but do hike quite a bit and wanted a light shoe for hot days on the trail. Though I didn't try these out on a "hot" day, I wore them on a ~8 mile hike and loved them. They are super flexible, well ventilated, and provide good traction. I wear a size 12 and these fit true to size, but do provide a little more width around the toes and balls of my feet than I expected (not that I'm complaining, I actually like that). Not only are they super comfortable on the trail, but I also wear them around town on occasion, and just as comfy. I think they look very nice as well. On a side note, I read in another review that if you are new to barefoot shoes (or maybe it was just these particular shoes?) that your calves will feel it after the first few runs/hikes. That was definitely true for me. Not a bad thing, but just FYI, I suppose. The "feel" of walking/running in the shoe was defintely different from what I'm used to, but it only took me a short time to acclimate. I would definitely recommend these.