At first I thought this was the perfect minimalist running shoe, but there are some minor issues. The inner boot is a little small for me to wear with socks. Fits fine without socks, but the boot absorbs like a sponge. If you have sweaty feet like me, running without socks is not an option during the hot months. Especially with this shoe. Might be an issue during rain. I tried wearing just the shell with no socks while running, but my foot slipped around a lot and squeaked while I ran (think wet flip flops). Worst issue was that it created a blister on one of my toes. By the way, this is the way I wear the shoes day to day. Works great as a minimalist casual shoe with shorts. Also good for pool. I've found the best solution for running is to wear socks with just the shell and no boot. Maybe if I had a bigger size, I could use the boot with socks. Although, I wonder if I would be as happy with the shoe overall. Sometimes debris gets in the shoe through the holes, which can be annoying. This has only been an issue as a casual shoe, but hasn't happened while running. I've only run about 70 miles so far in the shoe. My longest run being about 6.5 miles. I run on country roads that are not as smooth as a typical road and sometimes can be as rough as gravel. I was worried about the durability of the shoe, but it seems to be holding up. My past two Saucony CC shoes were extremely durable on these roads, and I'm hopeful the Ultra M will be the same. I literally ran holes in the bottom of my first Saucony CC shoe. Great ground feel for the minimalist runner. Plenty of room in the toe box. I highly recommend giving this shoe a try if you're a minimalist runner. Fortunately, a shoe like this will not cost a lot in a couple of years. It probably only costs very little to make this shoe including the liner.

This shoe is great. Fits very well and running feels very natural in them. It took me a few times to get used to running in them. My calves were extraordinarily sore the first few times. I really enjoy these.

I use the Vivobarefoot Ultra for working out at the gym and they are wonderful. They are extremely lightweight and the minimalist feel and lack of support really help the muscles in my lower legs. They took a little getting used to but they a comfortable and feel great. They run a bit tight with the insert in but have loosened up a little with wear.

Ease into these. The first time I went out I hurt my calf and couldn't run for about two weeks. Since then, I've eased into them by running one mile at a time. I'm now up to 4 miles and they seem to be working great.

These barefoot running shoes changed running for me, the advertisements are true. I am able to run further and feel less fatigued afterward. An added bonus is that by wearing fewer socks on a daily basis you are reducing your carbon footprint. The design is remarkable as they look way less dorky than the running shoes like a big rubber sock.

The sole is made of this cheap gummy material that starts to fall apart after a few wearings. The edging (where the sole meets the nubuck) also turns completely black from dirt and there is no way to clean it. I have worn them 10-15 times and I went from having clear soles to completely black soles.

This is a great shoe and would definitely recommend to anyone! Super comfy and stylish. It's my go-to around town shoe and it stands up to the elements. I had someone spill an entire beer on this shoe and it didn't effect the leather at all. Still looks great!