VivoBarefoot's Primus Trail III SG trail running shoes feature lightweight and breathable knit mesh upper and lining and grippy synthetic outsole to keep you stepping confidently and comfortably as you take on the trails.Every design element of a VivoBarefoot shoe supports the stimulation of "proprioception," which is the body's natural sense of its own position, balance and movementPure Barefoot Technology allows the body to provide natural shock absorption, motion control and sensory feedback via a wide toe box, ample flexibility and a patented, puncture-resistant outsoleBreathable knit mesh upper and lining with supportive synthetic overlaysDrawcord lace-up frontBLOOM® performance foam insoleShaped like a foot and flexible design to allow natural movementWider width for natural stabilityGrippy synthetic soft ground outsole