I was looking for a "barefoot" type boot as I usually wear vibram fivefingers, but the vibram fivefingers are not good at keeping the cold and wet out. While these are not exactly barefoot due to the .5" heel, they flex like crazy and are as comfortable as a warm slipper. My foot can bend and flex where it needs to for a natural foot strike in this lightweight boot. The liner inside is removable so it does move around when you remove your boot, I simply added some velcro to the underside liner myself. I am a size 10m and the 11 in this boot is a perfect fit, so size up!. Amazon is #1 in customer service and these boots are amazing!