After a couple of runs over the weekend in my Merrell Bare Access's with no negative side effects, I though I would break out a pair of my Vibram FiveFingers to see how they feel. Of the four pairs I own, I very scientifically selected the only pair that didn't still have the tags attached and ended up with the Spyridons (the version released in June, 2012). This would be my first run in VFF's that was longer than 200m or so. This would also be the first run that I have ever done (to the best of my recollection) with no socks.
I will start with the shoes, which were terrific. I am guessing that my slow transition to 0mm permitted me to change my running style so incrementally that they didn't feel very different. The shoes are light and I can feel the ground, but the Spyridons have this great waffle-style tread on the outsole that protected me from anything pointy on the trail. I even ran over a few rocks deliberately. I felt the them as I ran over them, but it wasn't like they were jabbing into my foot. This inspired a lot of confidence in the shoe.
Second, I was expecting them to be really warm on my feet, and I was blissfully wrong. While the Spyridons don't look like they are as breathable as other models, they performed very well in the heat, which was really intense (next paragraph). They mostly black with green trim, and use this shiny fabric that looks plastic-y over a stretchy Lycra-like material. The only negative I took away from the run shoe-wise was that I developed a small, yet painful blister on the inside of my left foot where the loop for the strap is sewn to the shoe. For my next run in them, I will put a Band Aid on the spot or try a pair of Injini socks.
As for the run, the weather was stinkin' hot again (north of 30C), intense sun and a strong wind blowing from the southwest just ahead of a severe thunderstorm that was forecasted for the evening. The plan was to go for 30 minutes out-and-back on a nearby recreational path and I decided to knock off another Zombies, Run! mission on my phone to help pass the time. The wind didn't affect me at all - it was actually rather nice - but the heat did. The path has very little shade. I just kept it steady and enjoyed my playlist and the mission. I ended up finishing the 'back' within a few seconds of the 'out', which actually felt pretty good. I will definitely be back in the VFF's again soon.