The Merrell Women's Trail Glove 5 Trail Running Shoes were created by studying the foot in motion. This trainer is designed to enhance the foot's natural ability to stabilize the body during rapid changes in movement. The Trail Glove 5 is a barefoot shoe and has been built with a full forefoot to allow for a more natural foot movement. When compared to the Trail Glove 4, it is running 1/2 size large. If you're looking for a similar fit to our previous version, we recommend you order a 1/2 size smaller than your typical size.