Regular Fit: These shoes are true to size for a supportive comfortable fit. Combining a 3D dual-density Pebax footplate midsole rocker geometry and SurfaceCTRL grip our new VECTIV technology is designed to maximise energy on the trail. And in the Infinites this translates as the perfect balance of responsiveness and protection in ultra-distance trail running shoes. They're incredibly durable thanks to Kevlar polyamide and Matryx while the 6mm toe-to-heel offset propels you into your next gait cycle.