The Hoka Challenger 7 GTX has improved cushioning thanks to a larger layer of CMEVA under foot, which not only provides non-stop comfort, but helps to move you through your transition for a smooth stride. The engineered mesh upper is reimagined with recycled content, for improved breathability as well as a comfortable, locked in fit. An improved lug pattern in the outsole gives you a smoother ride across paved surfaces, without sacrificing traction across the trail. DURABRASION rubber extends longevity while ensuring multi surface grip. The GTX model also includes GORE Invisible Fit waterproof membrane bonded to the upper, throwing water off no matter the weather.