Most of my runs are strictly barefoot, but there are times when I need a shoe -- cold, wet, slippery trails are one of those times. I've looked at the Vivobarefoot line for awhile now, but resisted taking the shoe plunge after having successfully left them behind. A friend on a barefoot running forum recommended these enthusiastically, so I gave them a go. I was absolutely not disappointed in the least. If you have to wear shoes, the Vivo line is the way to go as far as I'm concerned. Zero-drop, ultra light, removable sock liner to give even more of a feel for the ground under your feet. The toe box is exactly right, allowing your toes to splay naturally. If you are so inclined, you can even wear something like CorrectToes in these shoes, as the toe box is shaped just right. I loved these so much I bought a pare of Vivobarefoot Ultras for when I need a shoe on road surfaces, as well as a pair of their Gobi boots, which I have to say, are just about the most comfortable shoes I've ever worn in my life. And I hate shoes.